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: GRUQuote 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 :thumb:
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 :roll:
Quote from: 96gsQuote 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: KerryQuote from: 96gsQuote 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 :?
well guys i looked it up and u can go down to a 12tooth on the front which i think will make the GS a Wheelie machine for stunting but u can go upto 19 tooth on the front aswell which would increese topend, i'm going to get all of them and try every1 of them and then choose the best.
:thumb:
Sprocket Specialists (http://www.sprocketspecialists.com) offers (recommends?) all kinds of sizes for the GS500. The Sprocket Specialists listing for the GS500 in my Chaparral catalog includes:
* Aluminum rear sprockets with 32-74 teeth (from $34.96 to $62.96)
* A steel rear sprocket with the stock 39 teeth only ($32.96)
* Steel front sprockets with 11-17 teeth ($10.96)[/list:u]Just one caution on the Sprocket Specialists front sprockets: they are one-size-fits-all-years and don't come with the "shoulder" that the OEM sprocket on the '94+ model years has.
For some past discussion on this topic, see the old thread
spacer for 15T drive sproket (http://www.gstwins.com/forum/viewtopic.php?t=3664). I wish I knew what happened to thread #2244 which is linked to in that thread. "Um, JOHN?"
Another relevant thread (that includes the photo mentioned at the end of the first thread) is Knock when shifting (http://www.gstwins.com/forum/viewtopic.php?t=6910)
thats gr8 maz, tell us how they work out. espcially the 12t smaller stunter sprocket ;)
Devil's advocate here... I wouldn't recommend gearing down to 12. You will get a ton of slack and may have to cut or buy a new chain. You may risk binding the chain. I don't know how well the chain will "roll" over such a small sprocket.
I'd say better to go with a larger rear sprocket... when I can afford it I will try a larger rear sprocket.
yeah, it would be better to get a larger rear sprocket BUT they weigh more and slow you down...i wouldn't get a biger rear sprocket unelss it's aluminum or some kind of light metal
Quote from: GRUyeah, it would be better to get a larger rear sprocket BUT they weigh more and slow you down...i wouldn't get a biger rear sprocket unelss it's aluminum or some kind of light metal
You're replacing the rear sprocket- not adding another. So, you mean the added weight of two or three teeth will slow you down... Keep in mind that you have just regeared your bike- I think the extra ounces will be compensated for.
I'm just sayin' that the GS isn't the most weight efficeint bike- there are lots of things that can be done to clean it up. But I'm a fan of true working performance and will deal with added weight if it means my bike will run safer or more consistant.
I dropped one tooth in the front. You do not lose top end speed, actually as most stock GS's won't do redline in 6th gear in the first place. You will be able to get more top end RPM's when you lose a tooth, making up the speed difference.
Just completed the 15t install. Front and back sprocket went on very easily, but my chain did not want to break my buddy and I were using the chain tool and it just did not want to go. Finally got it to go then realized I had way too many links on the new 520 chain. I heard that the 15t will leave you with extra but damn... Had to take off a few to get it to work. Those links were stubborn as well and did not want to come all the way off. Had to grind down the two pins so they would slip out. Yes! It's out so then I put the master link on and it is really putting up a fight to snap in place. Well about 2hr's for the whole project and it's done.
First off I've noticed a big difference in low end tourque. Can actually use some clutch play and it pulls a good bit harder in first and second. Have noticed the engine reving harder and personally would feel that a 14t would be overkill and greatly effect top end speed. Overall I'm happy with the results. Damn O-ring chain really did not want to cooperate and had me worried for a second. Thank you Mr. Grinder...
Thnaks for bumping this thread back to the top. After all the work I did on the previous page to document the sprockets available from Dennis Kirk, I rediscovered a more comprehensive text file that I put together a while back. It includes chains and both sprockets, from 3 different catalogs.
For what it's worth!
http://www.bbburma.net/Documents/GS500_Chains&Sprockets.txt
EDIT: Changed link from sisna.com to bbburma.net.