whats the better 150 engine

[numroe]

Those Daytona 150 gear ratios look a bit weird:

1st to 2nd = 0.82 = very nice assuming 0.8 is ideal for a 4 spd MX box.
2nd to 3rd = 0.65 = way way too wide a gap for MX.
3rd to 4th = 0.69 = way too wide.
3rd to 4th = 0.77 = ok.

Published data:

Gear ratio : 18/67 (3.18), 13/34 (2.62), 17/29 (1.71), 22/26 (1.18), 24/22 (0.91)

If right, means the Daytona 150 is a cripple for MX. What is the target market for that engine?

[themountain]

Originally Posted by numroe

If right, means the Daytona 150 is a cripple for MX. What is the target market for that engine?

Pitbikes...??

[penumbra]

where did you find that data, Numroe if I may ask?

any more news on the delivery dates allready?

[numroe]

See link to "daxdodo" further back in this thread.

[Peter1230]

an average 140 will put out 12 Horsepower.
a 150 will do 16 Horsepower.
if you can go better than ur rockin
ur 125 probably has 9 horsepower

[themountain]

Originally Posted by Peter1230

an average 140 will put out 12 Horsepower.
a 150 will do 16 Horsepower.
if you can go better than ur rockin
ur 125 probably has 9 horsepower

WRONG!
a 125 does 7, a 140 9-10 and a 150 11-12 HP ....rear wheel of course

[Cactus Jack]

Yes , they're realistic figures mountain ......

[Peter1230]

Originally Posted by Cactus Jack

Yes , they're realistic figures mountain ......

not really.
Check ebay.
140 12 horsepower
150 16 horsepower
160 18 horsepower.
bet ya

[Cactus Jack]

If you wanna believe the exaggerated "BSHP" figures posted on ebay listings good on ya' ..... some people like to live in the real world aka REALITY ......

Jialing 125's put out 7.78 hp ... Lifan BVH 125's put out 8.45 hp :

Jialing 125 specs :

China Jaling Industrial CO., LTD.

Here's the true figures for a YX 150 .....

150cc motor Specifications

Bore and Stroke: 60X53mm
Cylinder Capacity: 149.8ml
Compression Ratio: 9.2:1
Power and Torque: 11HP/9500°500R/min
Max. Torque: 11N.m/5500°500R/min
Transmission Specs
4-speed all up transmission (n-1-2-3-4)
Manual Clutch (start in any gear)
Transmission Ratio:
Elementry: 3.722(18/67)
First Gear: 3.272 (11/36)
Second Gear: 1.937(16/31)
Third Gear: 1.35(20/27)
Fourth Gear: 1.043(23/24)
Engine Crate Includes

eBay Motors: LIFAN YX 150CC MOTOR ENGINE CRF50 XR50 125CC 140cc KLX (item 220258722059 end time Jul-24-08 20:33:30 PDT)

[Peter1230]

i dont know why i bother... but
why believe that then if u dont believe others.