I have a question about "46 tooth 4 / 5 plate lightened crownwheel MRB" Hi Mark, could you explain me what are the benefits about using a lightened crownwheel, on a semi-tuned motor? Thank you.

The theory is reduce weight from the moving parts to increase horse power.

Do you need a chain case spacer to fit one of this 5/6/7 plate clutch crown wheels and can you use a stand spider with it?

No spacer needed, they fit as standard and yes you can use a standard spider

Purchased one of these a few years ago from Jet200 Want to replace my plates and steels as I have been having problems with the operation First I noticed the tiny circlip on top of the pressure plate is broken so I will need to order one from you My real problem is creeping when clutch pulled. When I tighten the cable the clutch slips and the bike screams at high RPMS It feels like there is not enough room in there. What combination of plates, steels and top steel can you recommend for a 5 plate clutch?

If you open the link and read the 'Tips' section it should help you. http://www.lambrettaspares.com/spares/clutch-aand-chain-spares/clutch-assemnly-(kit)-46-tooth-5,-6-or-7-plate,-mb/mrb0758k.html

Skip to the end of the images gallery

Skip to the beginning of the images gallery

Lambretta Clutch crownwheel (sprocket) 46 tooth (4, 5, 6 plate) with bearings, Race-Tour MB

Name: Lambretta Clutch crownwheel (sprocket) 46 tooth (4, 5, 6 plate) with bearings, Race-Tour MB
SKU: MRB0674K
Price: 118.140001 GBP
Availability: InStock

3 Reviews Add Your Review

£118.14 £98.45

In stock

Only 6 left

SKU

MRB0674K

Crownwheel, 46 tooth, 4/5, MB plate lightened

Details

More Information

Questions (4)

Reviews 3

Reasons to Buy

Development History

Tips

Technical

We were so disappointed with the standard of available sprockets that we decided to have our own made.

They are designed to be used with the more reliable Li, Sx, Tv, Li-S type clutch needle bearings rather than the GP style bush.

Each crownwheel is supplied with 2 clutch needle bearings.

Our crownwheels are lightened as much as you can without suffering any issues. The bearing area is precisioned machined to give no rock or lift in the crownwheel making them more reliable for chain wear.

This sprocket can work with 4 / 5 plates or 6 plate internal type clutch conversions and has 46 teeth.

More Information
Brand	MB Racetour

Write Your Own Review

Only registered users can write reviews. Please Sign in or create an account

Lightweight.
Strong.
Hardened.
Precision machined.
Adjustable lift.
No rock.
Easy fit.

Fed up of poor inferior products we designed our own.
What ever product was used extra machining and grinding was required.
The precision of the crown wheel is very important for chain and clutch life.

Always dial gauge the crown wheel with the front drive sprocket to improve chain life.
Always check sprocket lift and shim up to suit.
Always fit new end plate bearings and clutch needle bearings.
Make sure both clutch friction, steel, pressure plate fit and slide up and down freely.
Always soak clutch plates in ST90 for 24 hours before fitting.
Steel tabs on top and bottom friction plate can be bend 20 degrees to aid the clutch.
Always use a clutch holding tool to tighten the clutch nut.

Designed by Mark Broadhurst.
Made in the UK using modern steels, lightened and precision CNC machined.