CR 90cc 3 speed Close ratio gear set Semi Auto race engine
We have found gear clusters to fit hence price reduction, so we don’t have to sabotage engines to get them!!
Limited edition close ratio tall first gear 30 mph
This is a really slick changing gear box where you can actually change down a gear without over revving the engine due to the sheer gap in the ratio! And it staying within its power range.
Can be use with standard C90 clutch cover
Spec 85cc
Gears N-1-2-3- UP
Ignition type Race VMR118 kit with Coil CDI and mini loom
2 options on tuning STANDARD OR REWORKED GAS FLOWED
1 Stock head and compression.
Or
2 Red TAG performance head, higher compression and altered valve timing
The above reworked allows the engine to hold the same power doesn’t build up excessive heat.
Option on carb Pre jetted PZ19 style 15mm slide ready to us with pod foam filter 35mm fitting.
Service info
Engine oil: 10/40 Mineral Oil
Capacity approx: 725mm
Valve clearance: 0.10mm inlet 0.12mm exhaust
Specifications:
Type: Single cylinder, horizontal, 4 stoke, air cooling, top cam
Size (L*W*H) mm* mm* mm: 477*395*280
Net weight, kg: 22.5
Bore, mm: 47mm
Stroke, mm: 49mm
Compression ratio: 8.8:1 stock 9.3 tuned
Ignition advance angle at idle speed: 15 @ 1500RPM
Lubricating system: Press splash
Valve clearance (cold state) mm: 0.03±0.01
Transmission type: Constant engage, 2 grade, 3 gears
Clutch type: Semi wet multi-plate
Primary reduction ratio: 1:3.722
Gear Ratios: 1St is a tall
Gear 1: 1 = 1:1.938
Gear 2: 2 = 1:1.350
Gear 3: 3 = 1:1.043