raptor two fiddy

[raptor684]

I had heard talk about a four valve head but nothing on it yet any body else heard anything for it?

[Pappy]

from what i understand (and i could be wrong) is that this engine has been in use in europe for some time. there is also supposedly tons of engine upgrades available but they have not made it here (usa) as of yet.

[katch26]

http://www.yamaha-motor.com/sport/products/modelspecs/571/0/specs.aspx
Engine
Type 249cc air-/oil-cooled 4-stroke; SOHC, 2 valves

Bore x Stroke 74.0 x 58.0mm

Compression Ratio 9.5:1

Carburetion Mikuni 29mm BSR

Ignition DC-CDI

Starting System Electric

Transmission 5-speed; wet multiplate clutch

Drive Train 2WD; sealed O-ring chain, eccentric adjustment


Chassis
Suspension/Front Independent double wishbone; 5-way preload-adjustable shocks, 7.5-in travel

Suspension/Rear Swingarm, preload-adjustable, 7.9-in travel

Brakes/Front Dual hydraulic disc

Brakes/Rear Hydraulic disc

Tires/Front AT20 x 7-10

Tires/Rear AT19 x 10-9


Dimensions
L x W x H 64.0 x 42.1 x 40.9 in

Seat Height 28.7 in

Wheelbase 43.7 in

Ground Clearance 3.9 in

Fuel Capacity 2.4 gal

Dry Weight 313 lb


Other
Lighting Dual 30W Krypton multi-reflector headlights & 21/5W brakelight

Warranty 6 Month (Limited Factory Warranty)

[bradley300]

diamond racing is currently working ona four valve head, i think hetrick will eventually and Snyder Motor Sports with GT Thunder may build one as well

[Pappy]

Originally posted by bradley300
diamond racing is currently working ona four valve head, i think hetrick will eventually and Snyder Motor Sports with GT Thunder may build one as well

you find a good stabilizer for yours yet?