Engine upgrade possibilities!

[LifeRider]

This is just a sample and I did not look enough to find the best choices - Just thought it was tought provoking.

Specs that I found (but you know every thing you tind on the web is true (Ha! Ha!):

CG250:
Max HP 14.1/7000 RPM
Max torque 16.5/5500 RPM

Loncin 250:
Max power 16.75/8000 RPM
Max torque 17/6500 RPM

I am sure that there are even better choices to be found. This is why these forums are so much fun!

[JerryHawk250]

Originally Posted by LifeRider

This is just a sample and I did not look enough to find the best choices - Just thought it was tought provoking.

Specs that I found (but you know every thing you tind on the web is true (Ha! Ha!):

CG250:
Max HP 14.1/7000 RPM
Max torque 16.5/5500 RPM

Loncin 250:
Max power 16.75/8000 RPM
Max torque 17/6500 RPM

I am sure that there are even better choices to be found. This is why these forums are so much fun!

I was looking at the Loncin 250 if I ever had to replace the engine. That 6th gear would be nice for the street. I also like that it has a balance shaft and the engine is already prepped for an oil cooler. I have a post somewhere on here about it.

[OneLeggedRider]

I think the bigger issue here is initial and final drive ratios even if it is a 6 speed gearbox. You might not be gaining anything other than moving your left foot more often. Now I do know with a performance engine more gears will allow you to stay in the "sweet spot" and get better acceleration times, but on these Briggs and Stratton engines the actual ratios would probably matter more.

For example I'm tired of going through Turbo 350 trannies in the old Chevy, even though I've got a mud kit in the last rebuild which seems to be holding up well. So I'm thinking about dropping in a 4 speed manual which will be bulletproof (and I prefer stick shifts). And 3rd gear in the manual is actually slightly lower than first in the Turbo 350 with zero power lost in fluid transfer. But there's a downside, if you try to shift a manual in the hole almost all forward momentum is lost and because of that the automatics almost always win. Better to keep power going to all 4 wheels all the time. But there are some guys that have figured out the absolute best ratio so they don't have to shift.

Idk, I absolutely loved my '88 YZ 80 and it would move, but even in 6th the top speed was about 60mph, maybe less, and I was always shifting.

[wedooit]

For example I'm tired of going through Turbo 350 trannies in the old Chevy, even though I've got a mud kit in the last rebuild which seems to be holding up well. So I'm thinking about dropping in a 4 speed manual which will be bulletproof (and I prefer stick shifts). And 3rd gear in the manual is actually slightly lower than first in the Turbo 350 with zero power lost in fluid transfer. But there's a downside, if you try to shift a manual in the hole almost all forward momentum is lost and because of that the automatics almost always win. Better to keep power going to all 4 wheels all the time. But there are some guys that have figured out the absolute best ratio so they don't have to shift.

Idk, I absolutely loved my '88 YZ 80 and it would move, but even in 6th the top speed was about 60mph, maybe less, and I was always shifting.[/QUOTE]
Here is a chevy idea, posted by superchevy ….

[JerryHawk250]

1st through 5th are the same gear ratio as the Hawk. 6th is a 2nd overdrive. You will be able to gear it for off road and 6th will have you at the right gear ratio for highway. I'll have to find the post where I have this information already.
Link to thread. http://www.chinariders.net/showthread.php?t=18754