How to true a atv crankshaft


Frequently Asked Questions - Crank Works

How should I ship my crankshaft to Crank Works?

Please see our shipping information page for shipping details. If you need assistance with how to package your components, click here to see our tips on how to ship.

How far can my crankshaft be stroked?

There are too many variables involved for us to quote this over the phone like connecting rod clearance, case clearance, counter balance clearance, deck height and many more. This is why we recommend speaking with an engine builder about your specific application. We specialize in crankshafts only and rely on engine builders for feed back. We will be happy to recommend a great engine builder for your application.

If I have a longer connecting rod installed, will it increase the stroke?

No. In order to increase or decrease the stroke, the crank/rod pin must be relocated to achieve the desired stroke. Installing a longer rod only increases the rod ratio, which is sometimes recommended if you choose to increase the stroke.

If my crank is trued, does this mean it is balanced?

Not necessarily. Please note that truing and balancing are not the same thing.

Truing is the process of aligning of the crank assembly on its straight-line axis in order to get the axial runout as close to zero as possible. While we do offer this as a standalone service, truing is always included when we assemble a crank.

In contrast, balancing is adding or removing weight in certain areas of the crank to ensure the weight is in equal balance across the entire crank assembly. When a crank is out of balance, forces are exerted in different directions, which leads to wasted energy, along with potentially increased wear on parts due to more vibration. Balancing allows for more efficient force exertion and generally reduces vibration. We offer balancing as a standalone service for most cranks.

Do I need to send a connecting rod with my crankshaft?

We manufacture our own line of premium rods, CWI Pro Rods, which are available for many motorcycle, ATV, UTV, and PWC models. We are also a distributor for Hot Rods, ProX, Wossner, Falicon, and Carrillo and have many of these rods in stock. We also have access to most of the O.E.M. parts needed to service a crankshaft. In some cases we may ask you to supply the connecting rod or other parts. This occasionally happens with vintage or rare models. We have worked hard to have a competitive price point with the products we sell and are below retail price in most cases.

What are fast riders or race teams doing with their crankshafts?

We pride ourselves in being trusted with some of the top racers' and race teams' crankshafts. We will not divulge confidential information for any price, so please do not ask!

I have a big race coming up, can I pay more to have my crankshaft rushed through?

We understand that a crankshaft never fails at a convenient time. As a crankshaft builder for many race teams, racers and weekend warriors, every crankshaft is important to us. Unfortunately all of our customers have a race coming up that they are hoping to make. But if absolutely necessary, we do offer an expedite service for $100 per cylinder for extremely urgent situations.

Why is my crankshaft taking so long?

There are many factors that can delay crankshaft service from the original time estimate. Many times there are unforeseen circumstances that we are not aware of until the crankshaft has started to go through our inspection process. Crankshaft service requires precision and craftsmanship in order to be completed correctly. We appreciate your patience!

ATV Services - Crank Works

Please remember to fill out a work order for every order. We cannot perform any work without a work order.

 

CHOOSE TYPE:

 

 

SINGLE CYLINDER CRANK SERVICES
Crank Labor / Rebuild Labor

2-Strokes -
4-Strokes up to 499cc -
4-Strokes 500cc or more -

Includes: disassembly, inspection, assembly, and truing of crank
Balancing NOT included
Does NOT include new parts if needed

$95. 00
$105.00
$125.00

Stroke

Increasing the stroke is a cost-effective way to add torque and power.
Includes: machining pin hole to desired stroke
Balancing NOT included, but is highly recommended
Does NOT include crank labor
Does NOT include new parts if needed
May require Rod Mod 1, 2, or 3

$335.00

Balance

Balancing reduces vibration and improves longevity.
Includes: machine work to balance to desired piston
Does NOT include crank labor
Does NOT include new parts if needed
Does NOT include any heavy metal added (32¢ per gram)*

$375.00*

Lighten

Crank is machined to reduce overall mass. Allows the engine to rev faster for improved acceleration.
Includes: machine work to reduce mass
Balancing NOT included, but is highly recommended
Does NOT include crank labor
Does NOT include new parts if needed
Some cranks may have additional costs

$285.00

True and Weld

Crank trued by a qualified technician to OEM specifications or better, and the pins are welded to ensure crank halves stay true

$65.00

Heavy Crank

Weight added to reduce acceleration of rotating mass and create more inertia. Allows the engine to rev slower for improved traction.
Includes: machine work to add mass
Balancing NOT included, but is highly recommended
Does NOT include crank labor
Some cranks can cost an extra $150 - $300 for heavy metal
Crank may need to be re-stroked due to warping during welding ($85 per web if necessary)

$450. 00*

Friction Reduction

Smooths the surface of the crank to allow the engine to rev faster and to improve acceleration

$195.00

* Additional charges for cranks requiring heavy metal added $0.32 per gram retail.
TWIN CYLINDER CRANK SERVICES
Crank Labor / Rebuild Labor

Includes: disassembly, inspection, assembly, and truing of crank
Balancing NOT included
Does NOT include new parts if needed

$300.00

Stroke

Increasing the stroke is a cost-effective way to add more power.
Includes: machining pin hole to desired stroke
Balancing NOT included, but highly recommended
Does NOT include crank labor
Does NOT include new parts if needed
May require Rod Mod 1, 2, or 3

$600. 00

Rod Modification 1

OD of bottom of rod is reduced to provide clearance for stroker cranks
Pricing is per rod

$30.00

Rod Modification 2

Rod Mod 1 + bottom of rod is narrowed for installation of different bearings or for a narrower crank
Pricing is per rod

$55.00

Rod Modification 3

Rod Mod 2 + rod beam is narrowed and the rod is shot peened
Pricing is per rod

$85.00

Balance

Balancing reduces vibration and improves longevity.
Includes: machine work to balance to desired piston
Does NOT include crank labor
Does NOT include new parts if needed
Does NOT include any heavy metal added (32¢ per gram)*

$550. 00*

Phase Pinning

Prevents crank from twisting out of phase

$20.00

Key The Centers

Prevents crank from twisting out of phase (Arctic Cat and Polaris)

$95.00

True and Weld

Crank trued by a qualified technician to OEM specifications or better, and pin welded to ensure crank halves stay true

$115.00

* Additional charges for cranks requiring heavy metal added $0.32 per gram retail.

Repair and replacement of the crankshaft on ATVs, checking the crankshaft sensor

You can buy a children's ATV in almost any motor show. However, in order for such a technique not to fail at the most inopportune moment, it must be carefully monitored. Especially behind such a node as the crankshaft.

The state of the crankshaft on the ATV directly affects the stability and serviceability of the engine of this vehicle. This component of motor vehicles is responsible for such an important process as the conversion of piston movement energy into torque. With damage to the crankshaft, the motorbike will immediately lose some of its power. In addition, the dynamics of the ATV also suffer, and the revolutions begin to “float”. nine0003

ATV crankshaft with timely repair and maintenance is able to serve the rider for quite a long time, this component rarely fails with proper handling of motor vehicles. Its complete replacement is required only when the owner ignored the signs of a breakdown for a long time.

The principle of operation of the ATV crankshaft

The crankshaft of the motorcycle engine consists of the following components: nine0014

  • cheeks used to combine different types of necks;
  • counterweights needed to balance ATV crankshaft components such as pistons and connecting rods;
  • sock that controls the power of the mechanism responsible for the distribution of gas. This part is equipped with teeth and gear, and is located in front of the crankshaft;
  • shank responsible for shaft power take-off.
  • The most commonly used crankshafts are either high-strength steel alloy or modified cast iron. nine0003

    Despite the fact that the design of the crankshaft is quite complicated, its principle of operation is extremely simple and clear. Inside the combustion chambers, the process of burning fuel and emitting gases is carried out. As a result of expansion, these gases act on a piston mechanism, which in turn produces reciprocating movements. Then, the pistons transfer mechanical energy to the connecting rods, which are combined with them using a bushing or a special piston pin. nine0003

    The connecting rod is connected to the crankshaft journal with a bearing, causing it to rotate. After turning, the crankpin begins to move in the opposite direction, producing a reverse movement of the crankshaft. After some time, the cycle repeats.

    Position sensor malfunction

    The following symptoms indicate a malfunction of this functional component of motor vehicles:

    • difficulty starting the engine or even its absence;
    • nine0013 incorrect operation of the engine at idle;
    • performance and power of the propulsion system of the device is significantly reduced;
    • engine load increases markedly;
    • lack of stability of revolutions, as well as their decrease or increase in random order.

    Checking the crankshaft sensor on an ATV does not take much time or effort, but as a result, you will be sure which component of the motorcycle is out of order. nine0003

    Among the existing ways to check the vehicle crankshaft sensor, it is worth highlighting:

    • measuring the resistance of the winding of this component using a multimeter. To do this, you will need to switch the device to ohmmeter mode. If the data obtained differ significantly from the standard indicators, then this indicates a malfunction of the crankshaft sensor;
    • measurement of the value of the inductance. In order not to get a false result, it is recommended to perform this procedure in a room with a temperature in the region of 20-22 degrees Celsius; nine0014
    • using an oscilloscope to check the signal. For this method, you will need professional technical support, and therefore specialists in service centers usually resort to it. This method is the most accurate.

    It is recommended to choose the most appropriate way to check the crankshaft sensors, depending on the equipment and skills at your disposal.

    Do-it-yourself ATV crankshaft repair

    Depending on the degree of wear and damage of the ATV crankshaft, it may need both partial repair and cleaning of components, and a complete replacement. Before you understand what kind of repair work will be required, the crankshaft must be disassembled. If you used the ATV quite carefully, and carefully monitored its technical condition, then most likely you will be able to get by with the restoration of the crankshaft. Only in extreme cases will it be necessary to completely replace this component with a new one. nine0003

    When repairing or restoring an ATV crankshaft, the following procedures are usually performed:

    • grinding, polishing and straightening the shaft components;
    • pulley repair;
    • channel cleaning;
    • removal and replacement of bearings and balancing.

    If you have the skills to carry out this kind of work and the necessary tools, then you can try to fix the crankshaft on an ATV on your own. However, it is much easier and more reliable to turn to the services of a trusted service center to complete this difficult task. nine0003

    Another option to rid yourself of all the above problems is to go to a salon that sells children's electric ATVs. This technique does not have a crankshaft and, accordingly, will cause much less trouble.

    05/29/2021 1024

    (CF800-X8 EFI) E16 Crankshaft, connecting rod, piston

    The information provided is for informational purposes only and serves to correctly select the required spare part in accordance with the diagram. Part number subject to change without notice. nine0003

    nine0109 more nine0109 more nine0109 more nine0109 more
    Model Number on the picture Part number Name Price
    Engine CF2V91W (CF800-X8 EFI) 1 0800-041000_set crankshaft complete with connecting rods and liners 0800-041000_set more nine0110
    Engine CF2V91W (CF800-X8 EFI) 1 0800-041000-0001 crankshaft assembly mark A 0800-041000-0001 more
    Engine CF2V91W (CF800-X8 EFI) 1 0800-041000-0002 crankshaft assembly mark B 0800-041000-0002
    Engine CF2V91W (CF800-X8 EFI) 2 0180-040007 crankshaft key 0180-040007 more
    Engine CF2V91W (CF800-X8 EFI) 3 0800-040006-0001 connecting rod bearing red X8 0800-040006-0001
    Engine CF2V91W (CF800-X8 EFI) 3 0800-040006-0002 connecting rod bushing black X8 0800-040006-0002 more
    Engine CF2V91W (CF800-X8 EFI) 3 0800-040006-0003 connecting rod blue X8 0800-040006-0003 nine0110 more
    Engine CF2V91W (CF800-X8 EFI) 4 0800-042000-0001 connecting rod assembly mark I 0800-042000-0001 more
    Engine CF2V91W (CF800-X8 EFI) 4 0800-042000-0002 connecting rod assembly mark II 0800-042000-0002 nine0110 more
    Engine CF2V91W (CF800-X8 EFI) 5 0800-042004 connecting rod cap bolt 0800-042004 more
    Engine CF2V91W (CF800-X8 EFI) 6 0800-040005 retaining ring 0800-040005
    Engine CF2V91W (CF800-X8 EFI) 7 0800-040002 piston pin 0800-040002 more
    Engine CF2V91W (CF800-X8 EFI) 8 0800-0400A0 piston rings set X8 0800-0400A0
    Engine CF2V91W (CF800-X8 EFI) 9 0800-040001-0001 piston X8 0800-040001-0001 more
    Engine CF2V91W (CF800-X8 EFI) 9 0800-040001-0002 piston X8 0800-040001-0002 more nine0110
    Engine CF2V91W (CF800-X8 EFI) 10 0180-040001-0010 nut M18x1. 5 crankshaft 0180-040001-0010 more
    Engine CF2V91W (CF800-X8 EFI) 11 0800-0400B0-0001 piston assembly 0800-0400B0-0001 more
    Engine CF2V91W (CF800-X8 EFI) 11 0800-0400B0-0002 piston assembly 0800-0400B0-0002 more

    On the   page 15 thirty 45 Everybody nine0003

    Display

    • nut M18x1.5 crankshaft

      crankshaft nut M18x1.5, this part is compatible and can be installed on CF MOTO ATVs, in accordance with the diagrams according to the catalog number 0180-040001-0010

    • nine0002 crankshaft key

      crankshaft key, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0180-040007

    • Reduced price

      crankshaft assembly (mark A) for ATV 800 0800-041000-2001 nine0003

      crankshaft assembly (mark A) for ATV 800, compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0800-041000-2001. If you find a similar crankshaft for CF X8 in Russia in stock and at a price lower than ours, please let us know. We are ready to discuss the price. Perhaps we will offer the price of the crankshaft even lower.

      35 900 ₽ 34 990 ₽

    • nine0002 Reduced price

      crankshaft assembly (mark B) for ATV 800 0800-041000-2002

      Crankshaft assembly (mark B) for ATV 800, compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0800-041000-2002. If you find a crankshaft for CF X8 in Russia in stock and at a price lower than ours, please let us know. We are ready to discuss the price. Perhaps we will offer an even lower price for the crankshaft for the X8. nine0003

      34 990 ₽

    • conrod bearing red for ATV 800 0800-040006-0001

      Red conrod bearing for ATV 800, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams by catalog number 0800-040006-0001

      nine0014
    • connecting rod bush black for ATV 800 0800-040006-0002

      black conrod bushing for ATV 800, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams by catalog number 0800-040006-0002

    • nine0002 connecting rod bearing blue for ATV 800

      blue connecting rod bearing for ATV 800, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in the catalog number 0800-040006-0003

    • connecting rod assembly mark I for ATV800 0800-042000-0001 nine0003

      connecting rod assembly mark I, this spare part is compatible and can be installed on CF MOTO ATVs, in accordance with the diagrams according to the catalog number 0800-042000-0001

      7 190 ₽ 5 990 ₽

    • connecting rod assembly mark II for ATV 800 0800-042000-0002

      connecting rod assembly mark II, this part is compatible and can be installed on CF MOTO ATVs, according to the drawings by catalog number 0800-042000-0002

      7 190 ₽ 5 990 ₽

    • connecting rod cap bolt

      connecting rod cap bolt, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0800-042004

    • nine0002 retaining ring for ATV 400/800

      retaining ring, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in the catalog number 0800-040005

    • piston pin for ATV 800

      Piston pin for ATV 800 is compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0800-040002

      399 ₽ 299 ₽

    • Sale

      piston rings set for ATV 800 0800-0400A0

      Piston rings set for ATV 800, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in catalog number 0800-0400A0

      1 190 ₽ 990 ₽

    • Sale

      piston I for ATV 400/800 0800-040001-10010

      Piston I, this part is compatible and can be installed on CF MOTO ATVs (X8, X4, X5 HO), according to the diagrams in catalog number 0800-040001-10010

      2 990 ₽

    • Sale

      piston II for ATV 400/800 0800-040001-0002

      Piston II, this part is compatible and can be installed on CF MOTO ATVs (X8, X4, X5 HO), according to the diagrams in the catalog number 0800-040001-10020 (0800-040001-0002)

      2 990 ₽

    • piston assembly I

      piston assembly I, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in the catalog number 0800-0400B0-0001

      3 690 ₽

    • nine0333

      piston assembly II

      piston assembly II, this part is compatible and can be installed on CF MOTO ATVs, according to the diagrams in the catalog number 0800-0400B0-0002

      3 690 ₽

    • Learn more