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Larger front sprocket on KZ750E
- jimikz
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06 Oct 2009 15:09 #325860
by jimikz
Larger front sprocket on KZ750E was created by jimikz
All the sprocket sites (JT, Z1) show my bike (1980 KZ750E-1) being able to take up to a 16-tooth front sprocket. But looking at the stock 13-tooth it's already a tight fit. Can I really fit a 15 or even 16 tooth? And if not then would changing over to a 530 chain make much of a diameter difference?
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- timebomb33
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07 Oct 2009 11:30 #326021
by timebomb33
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Replied by timebomb33 on topic Larger front sprocket on KZ750E
if you go up 2 two teeth on the front it is roughly the same as dropping 6 teeth on the rear front sprocket. it's a way cheaper to change out front than it is to replace the rear if it will fit. and you won't have to cut the chain either
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
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- Jeff.Saunders
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07 Oct 2009 12:39 #326029
by Jeff.Saunders
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Replied by Jeff.Saunders on topic Larger front sprocket on KZ750E
Typically 1 tooth is all you can go on the front before you run into clearance issues with the chain touching the transmission cover surround.
Some people have fitted larger sprockets by cutting the sprocket cover surround area off - I don't recommend this.
Some people have fitted larger sprockets by cutting the sprocket cover surround area off - I don't recommend this.
www.z1enterprises.com
Z1 Ent on Facebook,
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- jimikz
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07 Oct 2009 12:50 - 07 Oct 2009 12:56 #326031
by jimikz
Replied by jimikz on topic Larger front sprocket on KZ750E
if you go up 2 two teeth on the front it is roughly the same as dropping 6 teeth on the rear front sprocket. it's a way cheaper to change out front than it is to replace the rear if it will fit. and you won't have to cut the chain either
Thanks but that's not really my question.
Thanks but that's not really my question.
Last edit: 07 Oct 2009 12:56 by jimikz.
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07 Oct 2009 12:54 #326033
by jimikz
Replied by jimikz on topic Larger front sprocket on KZ750E
I used to have a 14-tooth on it but it was rubbing on the chain guard. The chain guard around the front sprocket unbolts on my bike but then there's no protection for the clutch pushrod.
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- mtkawboy
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07 Oct 2009 13:17 #326035
by mtkawboy
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
Replied by mtkawboy on topic Larger front sprocket on KZ750E
My 82 GPZ 750 only had room to go up 1 number to 14 teeth. Did it for a 6000 mile trip in 83 but put it back to stock when I got home,too hard on the clutch. Just rode faster, anyway
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
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- WABBMW
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08 Oct 2009 11:26 #326189
by WABBMW
Bill Baker
Houston, Texas
1982 KZ650 CSR
2008 Yamaha FZ1
2006 Yamaha FZ1
1977 Honda Supersport 750 four (sold)
1984 Honda Nighthawk 650 (sold)
Replied by WABBMW on topic Larger front sprocket on KZ750E
jimikz:
I just changed from a 13 tooth to a 14 tooth front sprocket, using a 630 chain. Jeff.Saunders is correct - a 15 tooth is too large, and a 16 tooth is really too large as it would contact the clutch pushrod, at least on my 82 KZ650 CSR. Even to get sufficient clearance with the 14 tooth, I had to elongate the 3 holes in the chain guard, so that it can be moced outboard slightly from the countershaft gear. Then I had to grind one area on the outside of the guard to clear the clutch pushrod.
The 14 / 33 gearing is very nice. Hope this helps.
I just changed from a 13 tooth to a 14 tooth front sprocket, using a 630 chain. Jeff.Saunders is correct - a 15 tooth is too large, and a 16 tooth is really too large as it would contact the clutch pushrod, at least on my 82 KZ650 CSR. Even to get sufficient clearance with the 14 tooth, I had to elongate the 3 holes in the chain guard, so that it can be moced outboard slightly from the countershaft gear. Then I had to grind one area on the outside of the guard to clear the clutch pushrod.
The 14 / 33 gearing is very nice. Hope this helps.
Bill Baker
Houston, Texas
1982 KZ650 CSR
2008 Yamaha FZ1
2006 Yamaha FZ1
1977 Honda Supersport 750 four (sold)
1984 Honda Nighthawk 650 (sold)
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- jimikz
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13 Oct 2009 08:20 #327284
by jimikz
Replied by jimikz on topic Larger front sprocket on KZ750E
Yeah that does help-thanks. I was wondering if I was the only one with this conundrum. I'll put on the 14-tooth. I already have a 32-tooth rear installed. I'm looking for a 30-tooth rear as the charts show them but I can't find one. I do mostly long-distance touring with this bike keeping pace with a ZX11 so if I can dial-back the tach a bit that would be nice.
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