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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 31 May 2011
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JT Sprockets help
Hey guys!

I'm looking to replace my stock sprockets with some JT sprockets on my 1990 XT600E.

Right now I'm looking into 14-47 or 15-47 combo.
Has anyone ever tried this combo?

There are no motorways/highways on my island.

Longest straight stretch is about 1.5km long

There are just the normal small sized town roads... most are normal asphalt roads, some are rock roads (those traditional cubes that are about 10x10 cm white or "black" cubes) and some dirt roads for fun.


I'm about to go back to the island in a few weeks and I'd like to have all the parts already there when I get back there.


Anyone?
Thanks!

Vando
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  #2  
Old 31 May 2011
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I've got 13-47 0n my '03 Xt6 at the moment, handles great,the best it ever has, quite good for off road but screams its nuts off when I get up to about 50mph. I'll keep them on for a bit but I think I'll try 14-46 next see if thats a better compromise for a mix of on/off road.
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Old 31 May 2011
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I think I've tried every combination of 13,14,15,16,42,45 and 47 sprockets.

Go to www.gearingcommander.com choose bike, model and stuff. Its actually me that have added the 1990 ext600e (should the same from that year and up) You canchange sprocekts and see what that does to the rpms at certain rpms and so on.

So if you know youre cruise-rpm is say 4000rpm, and you wanna be able to ride 80km/h then you can mess with hte sprockets and see whats the best.

14-47 is awesome, but on some streches it wears you out to change gears all the time, you might be getting on to ow revs in 4th, where you with stock gearing just woul dhave kept it in 2nd and ringed it out a bit.

With stock chan I can go op to 47 in the rear, and still use both 13,14 and 15.

I made a nev CS sprocket cover, so that you dont need to take of the gearlever. Just a single bolt. Really helps with the time in changing the CS sprocket. It takes about 10mins, and I know just which number on the chain/adjuster to choose with whatever gearing.

My advise is to get 14-47 for the fun/gnarly stuff, and for loose sand, and then a 15 in spare. The extra CS sprocket doenst cost ya much, and its a easy/cheap way to alter the bike.
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Old 1 Jun 2011
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Yeah you're right!

I'd forgotten about that website.

14-47 will cut my speed too much as I usually like ride at between 90-120 which I could only make it with too high RPMs like this.

I'll get the 14 and 15 cs sprockets and try them tho!

BTW, do ya know any EU online sellers of JT sprockets? lol


Thanks Dan & Jens!

Vando
Last edited by bacardi23; 1 Jun 2011 at 14:39.
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  #5  
Old 1 Jun 2011
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Try this JT Sprockets: Online Catalogue they say they deliver from London to all over.....
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Old 1 Jun 2011
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Thanks Keny!

Should've thought of that lol
Do you know their postage prices?

Didn't find any info on them selling online...
Do they have an online shop or is it just by calling them?


Vando
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Old 1 Jun 2011
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I buy loose sprockets from Kedo.

I buy did vx chainkits on ebay, and buy extra sprockets aswell (often different sizes)

120km/h and enduro-ish gearing doesnt mach, and really not on a 5-speed bike. Go slower on tarmac, or struggle more offroad.

I dont like to ride 120km/h on stock gearing, wouldn't like it at all with lower gearing.
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Old 5 Jun 2011
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My bike has to perform as a complete all rounder, from muddy ruts to 500km days on a motorway. I went for 14/45, drops first gear enough to be able to crawl along off-road without being on your clutch all the time, and still cruises at 120kph at between 5000 and 5500 revs. The XT has so much torque, you don't really need very low gearing off-road, unless you need a lot of acceleration. The rear tyre doesn't bog down in difficult terrain, open the throttle in first or second gear and it the rear tyre just rips through.
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