For a conventional 750cc side-valve, the original primary drive or something of equal value is usually sufficient.
However if you consider to increase the power of your 750cc engine and might even takle a spin on the race track, your 3-disc clutch will probably not be the appropriate companion.
In any case, this Cannonball primary drive offers traction to the very end of a 750cc Flatty's tuneability. CNC – machined steel and aluminium components, 5 friction discs and a sturdy aluminium pressure plate with spring-loaded steelballs assure a smooth frictional connection. The high quality of all components, perfect function and durability are the main aspects that have been taken care of while creating this product. Clean disengagement, engagement such as easy adjustment are nice side effects of this.
Anyone who rides it knows what we are talking about. But surely people will also enjoy this drive if they don't have a start number on their springer fork.
By the way, this primary drive is perfectly suited for hand clutch conversion, as the spring forces are comparatibly low. The result is a smooth, easy and precise clutch operation at the hand lever.
Due to various circumstances (improper selection, installation and maintenance) and applications under which belt drives are used, W&W Cycles is not liable for damaged belts.
- fits 45" / 750cc 1941→
- steel / aluminum / polyurethane / carbon fiber
- width: 30 mm
- kickstart only
- sprocket shaft type: tapered
- pitch: 8 mm
- number of teeth: 34 x 62
- with Locking tool
Graf Stroker Pistons 45”/750cc Flathead
These special Graf pistons are made for small twin Flatheads with 4.5” stroker flywheels. They are shorter than stock pistons so the engine case baffle plates do not need to be removed. Complete with piston rings, pins and locks.
HMB Shifter Ratchet for 750cc/45cui
Samwel WR Flathead Frames
Cannonball WR Style Racing Gas and Oil Tanks
Samwel WLDR Cams for W-Series
4-speed Transmission 45”/750cc
It is a fact that while the engines seem to last forever, those worn, clunky 45” transmissions can be a continuous source for trouble. Full restorations - and that’s exactly what is often required - are expensive and tasks for the real experienced only, so it is definitely worthwhile to consider a complete replacement. Especially when this replacement is not just a well functioning duplicate of the same old thing but a large improvement, too.
A real drawback with original 3-speed transmissions is the large gear ratio difference between 1st and 2nd, i.e. from 2.47 to 1.57:1 with a consequent big rpm drop. If you ever rode 2-up in the mountains you will know how annoying this can be. The 4-speed version with its extra gear is a vast improvement here because it allows you to stay in the power band much better for an overall riding performance unknown before. Additionally, all gears are machined from modern materials for higher strength and feature an updated tooth-design for smoother and quieter running. Solo machines, sidecar rigs and Servi-Cars - all likewise benfit from these features.
The 4-speed transmission comes completely assembled with all gears, shafts and covers installed for a quick, straightforward installation. It accepts your original primary drive with clutch and the chain sprocket with cover. It looks exactly the same as its 3-speed counterpart so nobody can tell the difference from its outer appearance. The only extra part required is a 4-speed shifter gate.
Stock 3-speed gear ratios:
1st - 2.47:1
2nd - 1.57:1
4-speed gear ratios:
1st - 2.67:1
2nd - 2.03:1
3rd - 1.42:1
4th - 1:1
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: firstname.lastname@example.org