# CJR - Adjustable Cam Sprocket for CRF110 and CRF125

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- **Breadcrumbs:** [Home](https://tboltusa.com/store/index.md) > [Japanese Mini Bike Parts](https://tboltusa.com/store/japanese-mini-bike-parts-c-100.md) > [CRF110F](https://tboltusa.com/store/japanese-mini-bike-parts-crf110f-c-100_817.md) > [CRF110 Engine Carb Electrical EFI](https://tboltusa.com/store/crf110f-crf110-engine-carb-electrical-efi-c-100_817_1086.md) > CJR - Adjustable Cam Sprocket for CRF110 and CRF125
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All prices are in US dollars (USD). Shipping and any tax are worked out at checkout.

## Summary

- **Part number:** CJR-1386
- **Price:** $29.99 USD
- **Stock:** Out of stock. It cannot be added to the cart right now. A person can ask to be emailed when it is back: [Get on the List](https://tboltusa.com/store/contact_us.php?pid=12088&stockcheck=true) ([Contact us](https://tboltusa.com/store/contact_us.md))
- **Product id:** 12088
- **Product last changed:** 2026-02-25

## What it fits

The store lists a part under each bike or engine model it is meant for (the categories below) and may name models in the description. Do not assume it fits a bike or engine that is not named here; ask the store first.

- [Japanese Mini Bike Parts > CRF110F > CRF110 Engine Carb Electrical EFI](https://tboltusa.com/store/crf110f-crf110-engine-carb-electrical-efi-c-100_817_1086.md)
- [Japanese Mini Bike Parts > CRF125F](https://tboltusa.com/store/japanese-mini-bike-parts-crf125f-c-100_1090.md)

Where a fitment line says "All", it means all years of the model named on that line, not all bikes.

## Description (the store's own text)

Add an upgraded HD cam sprocket to your setup with an adjustable +/- timing wheel. Advancing the camshaft allows the valves to open and close sooner to help improve low end performance, while retarding the camshaft will allow the valves to open later which helps increase high rpm overrev performance at a loss of low RPM torque. This cam sprocket serves multiple models and has 2 cam timing marks for MSX and 110 models.

**Specifications:**

- A change of +/- 2.5\* degrees of timing per line. (ADVANCING THE CAMSHAFT WOULD BE ROTATING LEFT TOWARDS 11:00 WHILE RETARDING THE CAM SPROCKET WOULD BE ROTATING RIGHT TOWARDS 1:00)

**Note:** Verify your sprocket degree before install by lining up the sprocket teeth with the inner pin that locks against the camshaft. Once lined up, Loctite & tighten the bolts, then re-check the cam timing is matched up. Ensure to turn the engine over after a cam sprocket change, or check clearances to view the maximum degree that can be changed either direction.

**Note:** Cam sprocket is not set to default position when shipped due to fitment for multiple models, ensure all 3 bolts are tight with Loctite. Please see information below for default position placement.

1. CRF125 - Use middle 110i mark
2. CRF110 - Use middle 110i mark

## Shipping and returns

- Flat rate shipping is $8 for parts orders under $75 and free for most parts orders over $75, within the continental 48 states. Heavy items (engines, complete bikes, suspension) are excluded.
- Full shipping policy: [Shipping policies](https://tboltusa.com/store/shipping-policies-i-6.md)
- Returns: the store's own policy page says how returns, exchanges and cancellations work. Please read it before buying: [Returns, Exchanges and Cancellations](https://tboltusa.com/store/returns-exchanges-and-cancellations-i-11.md) The page begins: "All products returned to T Bolt USA must be reviewed and approved."

## How to buy

This item is out of stock, so it cannot go in the cart now (see Stock above).

Cart: [Shopping cart](https://tboltusa.com/store/shopping_cart.php)

## Photos

- [Photo 1](https://tboltusa.com/store/img/p/12088/cjr-adjustable-cam-sprocket-for-crf110-and-crf125-1.jpg)

## Support

Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online [Pit Bike Technical Info Database](https://tboltusa.com/store/tbolt-usa-pit-bike-minimoto-technical-info-database-tech-15.md)!

We have all necessary support parts on hand.

*Most* orders ship same, or next business day, unless otherwise noted above.