Looking for a 45 tooth rear sprocket...

How have you made your GTS go quicker?

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Julescapri
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Looking for a 45 tooth rear sprocket...

Postby Julescapri » Thu Apr 08, 2010 6:08 pm

Hi everyone - could one of you recommend a supplier in the UK who will have a 532-type rear sprocket with 45 teeth? Just looking to lower the revs a bit and stop me hunting for that elusive 6th gear! Ta! Jules

wheeler
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Postby wheeler » Thu Apr 08, 2010 7:11 pm

you will still hunt that 6th gear... :lol:
I drive the 17/45 combo and at 100km/h i have exact 4000 RPM in 5th gear.

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24c
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UK rear sprocket suppliers

Postby 24c » Thu Apr 08, 2010 7:14 pm

MandP, bitzforbikes etc. I did have a few odd new sprockets lying around though.

A useful topic
http://www.gtsclub.org/forum/viewtopic.php?t=34

EDIT I am not sure, but I think an FJ1100 rear sprocket is a 530, and possibly fits our hub. OEM for this is a 41. A long while back I'm sure I could get a 39-48 in a 530 to fit the bikes.
I don't have my wholesale books around at the moment, but the GTS part number was 866## in a 532 chain as standard, and I can't remember if the 530 was an 859## prefix, where ## was the number of teeth.
I've just started riding the GTS again, and it'll be changing

james_ward
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Postby james_ward » Mon Apr 12, 2010 5:55 pm


Julescapri
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Location: Isle of Wight, England

Postby Julescapri » Mon Apr 12, 2010 6:26 pm

Thanks 24c, wheeler and Jim for your help... looks like the better option would be 42 or 43 teeth, but would need to be a 532 size, not a 530... There has been lots of discussion about 530 vs 532 and is it pitch or width that differs? looked on the Wemoto site, but only a 1 tooth drop, so not enough. Any further ideas? - I once saw a custom machining shop website who would make anything, but lost the link! Thanks everybody... Jules (still high-revving on the Isle of Wight)

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24c
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Postby 24c » Mon Apr 12, 2010 8:00 pm

Julescapri wrote: Any further ideas?

I checked out my SuperSprox on the blue GTS and it is part number 85943...suggest you do a search, as 859 is definitely the 530 pitch, and you will have to change the chain and front sprocket too! :)

http://www.motorcycle-spares.com/yamaha ... -1105.html
http://cgi.ebay.co.uk/859-43-Rear-Sproc ... 47404966QQ

I can get them cheaper, but I have to troll a big order up.
I've just started riding the GTS again, and it'll be changing

ducati916rdr
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Sprocket

Postby ducati916rdr » Tue Apr 13, 2010 1:35 am

In the USA the normal thing is to run 530 chains. The 532 is very expensive by comparision. I have two GTS1000's and on the first I run 17 front and 40 rear dropping the revs~600 rpm or more. The second bike has 15/42. SUNSTAR makes sprokets or look up DENNISKIRK.com for more info.

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Gearing

Postby 24c » Tue Apr 13, 2010 6:42 am

GTS1000s can definitely handle a big gearing change, I remember Dave Saunders aka Evel carried a big change over the original 17/47.

The smallest rear sprocket off the shelf I saw was a 38 if I remember correctly, never seen anything bigger than a 17, although I know a guy in Birmingham, who made special order kart front sprockets for the old Yamaha 250 two stroke singles, which had a similar looking hole centre.

The engine has loads of grunt say vs. a YZF750SP which struggled with it's 85 mph first gear, although loaded two up on a hill with full panniers etc might be a test! :)
I've just started riding the GTS again, and it'll be changing

qingjan

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Postby qingjan » Mon Nov 29, 2010 7:24 am

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