For WR factory racers the MoCo made a special "Light Frame" with numerous lightening holes on forged parts and various brackets omitted to save weight. On the other hand two rear frame braces were added to increase stability and two tabs to accept the spiral springs for a small racing seat. Unlike the original counterpart this reproduction is built from sturdy steel and not from chrome-moly tubing, which was prone to break. Now you can build your authentic race bike with peace of mind. Dimensions and details exactly follow the factory counterpart.
Please check permission to use these frames as replacements with your local authorities.
- fits 45”/750 cc W & WR models 1941-1952
- steel / dropforged steel
- replaces OEM 47006-48R
Wheels with Star Hub and Classic Profiled Semi-Drop Center Rim
TWH Racing Brake Pedal
TWH Flat Track WR Footclutch Pedals
Classic Springer Forks - for 45”/750cc Solo Models
Length is measured from axle center line to seat of lower steering head bearing.
Cannonball WR Style Racing Gas and Oil Tanks
Truett & Osborn Stroker Flywheels for 45” Flatheads
The selection includes:
- flywheels for stock 45” crank pin and connecting rods
- flywheels for racing purposes which work with stronger 1957-84 Sportster crankpins and connecting rods
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: email@example.com