Jump to content
Sign in to follow this  

sprocket selection

Recommended Posts

OK ! what is the rule of thumb for sprocket selection. I am looking for better highway speeds but also do not want to loose the bottem end. Any help would be great

:)

Share this post


Link to post
Share on other sites

for highway speeds, stick with stock gearing. I have 15/47, and that's buzzy enough at 60.

Share this post


Link to post
Share on other sites

if your bike is stock or with just bolt-ons changing the gearing will not let you get past the 100MPH wall

you need more power to do that

Share this post


Link to post
Share on other sites

you have walls that go 100MPH :) All sarcastic remarks aside, the bike stock will meet the power drag ratio at around 100

Share this post


Link to post
Share on other sites

i went from the stock 41 to a 39 rear didint really notice any power loss but it will purr along at 60 all day now

Share this post


Link to post
Share on other sites

It's a compromise at best. I put a 41 on the rear for lowered hiway rpms but I change from a 15 in front to a 14 or 13 for off road. For me, it seems easier than changing the rear sprocket. I can do this on the same chain.

Share this post


Link to post
Share on other sites

Have a stock front and a 44 rear (Easyer wheelies...) No probs cruising at 75 mph (120kmh). Can still press the bike to around 90-93mph,but this bike isn't made for high speed ,so when i want to go flat on the highway -> I use my other bike..:)

Share this post


Link to post
Share on other sites

OK, lets clear some issues up:

It appears by his username that he has an SM... so stock gearing is 15/41.

On a straight flat road with no headwind, a stock S or SM will do low (possibly mid) 90's. [Keeping in mind, the stock speedo is a solid 10% optimistic]

Bumping up the gearing is simply going to lower the revs at a given speed, not increase the speed... since the DRZ is limited by drag/power not by running out of gearing.

Bumping up the the gearing will make for a much better highway commute, I personally opted for a 16 tooth driven sprocket in the front. It does, however, make a noticeable change coming off the line.

Share this post


Link to post
Share on other sites

Thanks for the info. I going to see what the upgrades i'm doing this weekend

will do for me.

slip on FMF power core 4 / k@n filter -- if the bike wheelies with less effort i will stay with the stock gears. (or) get the header pipe and do the jetting we

will see

oh also switched to synthetic oil :)

Share this post


Link to post
Share on other sites

I run 15/51 and the bike just about tops out at 85. 15/44 wasn't enough grunt for me in the woods. I needed that low end.

Share this post


Link to post
Share on other sites

06wrx, how do you get that top speed with that gearing, I have 15/48 and it feels like its burning up at 55 in my top gear, I have a 06 SM that is re-jetting with stock pipe. Can I push my bike harder?

Share this post


Link to post
Share on other sites

yes you can but you do not want to push it all day long

it has a 10,000 REV limiter

with 16-41 on my SM I can only hit the rev limiter in the furst 3 gears ... after that it runs out of power

Share this post


Link to post
Share on other sites
06wrx, how do you get that top speed with that gearing

Because you're comparing apples to oranges. The S has a larger rear tire which makes about 3 teeth difference in gearing between the S and SM.

Simply put, 15/41 SM and 15/44 S are nearly identically geared when you calculate in the rear tire size difference.

Share this post


Link to post
Share on other sites

I like how my SM runs with the 16-41 ... but if your looking for top MPH a 15-41 will help to get over 90MPH

the stock motor just don't have enef poop to brake 100MPH

mods are 3x3 re-jet , pipe, and E cams

Share this post


Link to post
Share on other sites

I disagree. My S turned SM will hit 105 indicated (100 true) with 15/41 gearing.

It will, but that does'nt mean I will, much..

GB :)

Share this post


Link to post
Share on other sites
Thanks for the info. I going to see what the upgrades i'm doing this weekend

will do for me.

slip on FMF power core 4 / k@n filter -- if the bike wheelies with less effort i will stay with the stock gears. (or) get the header pipe and do the jetting we

will see

oh also switched to synthetic oil :)

OK ! Did the mods and It's like new bike more power and alot more fun to ride

thumbs up

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...