I'm trying to make my 81' 250r faster, I already bored it out a little bigger and have 34mm carb on it and was wondering about the number of teeth I could run to make it a little quicker
New to the board
Arm chair racerNew to the board
I'm trying to make my 81' 250r faster, I already bored it out a little bigger and have 34mm carb on it and was wondering about the number of teeth I could run to make it a little quicker
I like to live life on the line between Dangerous and Badass
Just Too Addicted
Arm chair racerJust too addicted
You need to explain what your looking for. Faster top speed or faster acceleration. Its only one or the other.
New to the board
Arm chair racerNew to the board
Sorry ya I forgot to put that, I'm looking for top speed
I like to live life on the line between Dangerous and Badass
First Time Rider
Arm chair racerNew to the board
What size sprockets are on it now?
New to the board
Arm chair racerNew to the board
13 in the front and 44 in the back I believe
I like to live life on the line between Dangerous and Badass
First Time Rider
Arm chair racerNew to the board
My suggestion would be to go up to a 14 on the front and see how you like it. You will notice a difference!
At The Back Of The Pack
Arm chair racerAt the back of the pack
This may help you....
A tooth on the front sprocket either way makes about 3 times the difference than a tooth on the rear sprocket. 12/40 .300, 12/39 .308, 12/38 .316, 13/41 .317, 12/37 .324, 13/40 .325, 13/39 .333, 12/36 .333, 14/41 .341, 13/38 .342, 14/40 .350, 13/37 .351, 14/39 .359, 13/36 .361, 15/41 .366, 14/38 .368, 15/40 .375, 14/37 .378, 15/39 .385, 14/36 .389, 15/38 .395, 15/37 .405, 15/36 .417
When the ratio goes up you go faster by difference in the ratio. Your torque goes down by difference in the ratio Or approximately 2.5% speed and torque change for each rear sprocket tooth change and 7.5% speed and torque change for each front sprocket tooth change.
Going from 20 inch tires to 22 inch tires will make a difference also increasing your top end speed in each gear and reducing your top torque. Your torque will be decreased by about 10% and your speed will be increased by about 10% Or approximately 5% speed and torque change for an inch difference in tire diameter
'83 Big Red
'85 350X
'86 350X
'06 CBR1000
'08 Road King
'11 Electra glide Ultra Classic
My feedback thread: http://www.3wheelerworld.com/showthr...or-ScreaminRed
Power User
Roostin Away
13/38. just do it. go on... you know you want to. no really. do it. you'll be pumped
First Time Rider
Arm chair racerNew to the board
Ill do it, you know I want to!Originally Posted by manbearpig
New to the board
Arm chair racerNew to the board
I guess I'll try it out
But next question... where can I find one?
I like to live life on the line between Dangerous and Badass
Power User
Roostin Away
Just Too Addicted
Arm chair racerJust too addicted
I've got a stock '82 250R that needs a new rear sprocket. If I get the 13/38 what length chain do I need?
Recommendation for good chains?
"See, morbid and creepifying, I got no problem with, long as she does it quiet-like. "
Trikes:
1982 Honda ATC250R(in process), 1984 Honda ATC110, 1984 Honda 200s, 1985 Kawasaki KLT160(not running...yet)
Quads:
1990 Suzuki LT250S, 2013 Suzuki LT-Z400, 2014 Honda TRX450R SE
Power User
Roostin Away
if you run smaller sprockets on the front and rear, without an extended swinger, you can just buy a stock length chain and cut it down
i like RK, but have run DID and the no name $20 ebay chains with no issues to report yet.
First Time Rider
Arm chair racerNew to the board
Is this the right rear sprocket?
http://shop.pbisprockets.com/product...&categoryId=16
Power User
The day begins with 3WW
I have a 38T first gen 250R sprocket and axle on the back of my 200X
I got my sprocket from here:
http://sprocketspecialists.com/
was about the same price and material as the PBI. They sometimes don`t show it in stock but they will cut whatever size you want. I called about ordering one cut and they had some 38s on the shelf
Reply With Quote