if you did, how much more execeleration did you get, i know you lose out on the top end, but i wonder if it helped when doing twisties at 60-70 mph? also if you had after market exhaust and jet kit, did it give it enouth power to do a power wheelie?

I dropped a tooth up front.  I definitely felt more punch at the low end and more strain at the top.  Unfortunately, I've never wheelied; but it seems like the bike is willing to do it now if I were to ask.  Overall I really like the extra pull.  However, I do notice that I need to shift sooner.  Its worth it, in my opinion.

Good luck,
Emmett Lyman

i dropped 2
pulls good out of a corner....6-10k area

accelerates much quicker!!!!!

yeah it probably drops top sppeed to...100-105....so what

Easy Mod.  You will accelerate quicker.  You will loose a couple gallons on your gas millage.  At 85mph my bike is at 7000 RPMS.  Try it- 15 bucks and 30 minutes.

Quote from: Hi-TEasy Mod.  You will accelerate quicker.  You will loose a couple gallons on your gas millage.  At 85mph my bike is at 7000 RPMS.  Try it- 15 bucks and 30 minutes.

That really isn't much of a RPM loss. My bike at 85mph is turning 6500 RPMs and it has stock gearing.

Quote from: Hi-TEasy Mod.  You will accelerate quicker.  You will loose a couple gallons on your gas millage.  At 85mph my bike is at 7000 RPMS.  Try it- 15 bucks and 30 minutes.

30 minutes?  :x  i must have instaled it wrong or something....i just removed that C clip and took the 16 off...put in the 15 and put the C clip back on...i didn't test it yet....i'll test it tomarow

it took me 10 mins....did i forget something?

I just purchased the 15t  front and a 39t rear and am looking to install this weekend. Will add to the discussion then.

If anyone is interested i have a brand new 14 tooth sprocket i can sell ya.

It took me darn near half a day.  But I replaced both sprockets and the chain at the same time, and it turns out chains are a royal pain in the a-- to get together!  I actually bought a new workbench vise from Home Depot and snapped the casting while trying to push the pin through!  Luckily they let me replace it with another, which got the job done.  Maybe $50 for a chain tool isn't such a bad deal after all!

Emmett Lyman

Quote from: GRU

Quote from: Hi-TEasy Mod.  You will accelerate quicker.  You will loose a couple gallons on your gas millage.  At 85mph my bike is at 7000 RPMS.  Try it- 15 bucks and 30 minutes.

30 minutes?  :x  i must have instaled it wrong or something....i just removed that C clip and took the 16 off...put in the 15 and put the C clip back on...i didn't test it yet....i'll test it tomarow

it took me 10 mins....did i forget something?

yeah, tighten the chain back up!!!!! :mrgreen:

Quote from: werase643

yeah, tighten the chain back up!!!!! :mrgreen:

did that too

i couldn't belive how loose my chain was after i put in the 15 T sprocket...my chain had a little more play in it then it should have when i bought the bike, but it was still ok...when i put in the 15 T sprocket, i could take off the chain off the rear sprocket with one finger lol

yeah, when i put on my 15t, before it was rather tight (within spec.), after, it was like worn out kitty

Quote from: 96gs

Quote from: Hi-TAt 85mph my bike is at 7000 RPMS.

That really isn't much of a RPM loss. My bike at 85mph is turning 6500 RPMs and it has stock gearing.

I bet Hi-T has a larger rear tire than you do, which makes for lower RPMs at a given speed.
It also makes for an interesting way to (possibly?) get some of your lost MPGs back!

@ gitarman, how expencive was that sproket?

Quote from: Kerry

Quote from: 96gs

Quote from: Hi-TAt 85mph my bike is at 7000 RPMS.

That really isn't much of a RPM loss. My bike at 85mph is turning 6500 RPMs and it has stock gearing.

I bet Hi-T has a larger rear tire than you do, which makes for lower RPMs at a given speed.
It also makes for an interesting way to (possibly?) get some of your lost MPGs back!

I have a 140/80/17. But its almost worn out so I'm going to go back to stock size, 130/70/17(?) when I get a new one.

I should have mentioned:  Along with a larger rear tire dropping the RPMs at a given "ground speed", a larger FRONT tire will show a lower ground speed in the first place.

So the ratio of MPH to RPM depends on the diameters of BOTH tires, as well as the sprocket tooth counts....

Does Casio make a calculator for this sort of thing?  My head is starting to hurt!  

Bigger tire- Yes.  I run an avon46 140/80... but even before I was coming out at about the same,  and keep in mind that I'm running a full jet/pod filter/exhaust kit... if that makes a diff.

10 minutes is quick- I'm one of those dorks that works fast but goes through all the steps and then check, double checks and idoit checks my work.  An extra 20 minutes is worth a heck of alot of confidence in the canyon.

what other minor(cheap   ) mods like these can increase acceleration? I am thinking that after I get comfortable with stock setting I will want to do a few mods to increase acceleration while still keeping atleast a 85 to 90 mph tp end so that I can still go on the freeway.

Quote from: Jundie@ gitarman, how expencive was that sproket?

I don't know where gitarman bought his sprocket, but here is a set of GS500 sprocket part numbers and prices from Dennis Kirk:
Name                      Front Sprocket                 Rear Sprocket
Brand             14 Teeth    15 Teeth    16 Teeth      36 Teeth (Steel)
========================================================================
Parts Unlimited
 '89-'93         8-265-14    8-265-15    8-265-16         8-962-39S
                   $10.99      $10.99      $11.99            $23.99
 '94-'02         8-411-14    8-411-15    8-411-16         8-962-39S
                   $11.99      $11.99      $12.99            $23.99

SunStar
 '89-'93        80-080-14   80-080-15   80-080-16        80-033-39S
                   $12.99      $12.99      $12.99            $35.99
 '94-'02        80-067-14   80-067-15   80-067-16        80-033-39S
                   $20.99      $20.99      $20.99            $35.99

JT Sprockets
 '89-'93        80-993-14   80-993-15   80-993-16        81-090-39S
                   $ 9.99      $10.99      $10.99            $26.99
 '94-'02        80-985-14   80-985-15    -------         81-090-39S
                   $13.99      $13.99    -------             $26.99

i'm seriously think about getting a 14 tooth
i have a 15/39 right now, i like it, but since i ride in the city/twisties most of the time a 14 might be even more fun... but is a 15/40 of 15/41  better choise? are there 40/41 sprokects avalible for the gs500? i've read that with a 14 tooth sprocket the chain makes too tight turn which will increase the wear