KZ to R1 rear conversion - Chain and sprocket help

Ok So I'm doing an 08/10 R1 front and rear conversion to my 77 KZ 1k.

2010 R1 = 17/47 w/530 chain.

I am going to need a new kz front sprocket with an offset I'm guessing.. What should I go with chain size, 530, 525, 520, and what sprocket sizes for a normal final drive.

PS engine is overbore and supercharged.

Thanks.

Go with a 530 chain. There are some wicked Pro-Street bikes running 600+ HP using 530 chains. Plus, pretty much any 520 and 525 sprocket for a Kz will be custom.

I'm planning on going with a 19/45 combo as an initial setup on my 1428cc build. But I have a 18/40 on my stockish Kz1000. Both bikes have 17" rim conversions.

Later, Doug

StreetfighterKz wrote: Go with a 530 chain. There are some wicked Pro-Street bikes running 600+ HP using 530 chains. Plus, pretty much any 520 and 525 sprocket for a Kz will be custom.

I'm planning on going with a 19/45 combo as an initial setup on my 1428cc build. But I have a 18/40 on my stockish Kz1000. Both bikes have 17" rim conversions.

Later, Doug

Ah, that's good info. I forgot about the wheel size differences too. So is 18/42 530 the same as stock w/630? I need to understand the differences in steps to make a decision. Then I need help with understanding the effect of dropping to a 6x17 rear wheel with a 190 tire.

I run stock engine

190 rear tire 520 chain 18 front 41 rear

18/45 may be perfect

but les had a 1075 rocket sled if you guys manage to get your combination to compare his gearing
near perfect I'll let him disclose his secrets I dont fire it up and tell lol but he has a good starting point


chain is a 520 DID ER2 or 3 cant remember it has stretched a little but almost none compared to the level of abuse lol

If you want to avoid the expense of aluminum sprockets, you will be limited on the rear to what is regularly available for the 2010 R1 - and that appears to be JUST 47T in steel - not good. Although it looks like JT does as small as 43T in aluminum.

Stock gearing on the KZ is 630 15/33 that's roughly 18/40 converting to 530.

The smaller the wheel, the smaller you go on the rear sprocket. Run a tape across both tires to get the diameter - then divide the smaller by the larger - this is how much smaller you want to make the rear sprocket to retain the same gearing. For example: 24" on the KZ and 23" on the R1 wheel, you end up with 23/24 = 0.958 = multiple 40 by .958 and you end up with 38T for the rear sprocket.

That's all assuming you plan on keeping the stock gearing.

i like the 530 19/45 set up on mine. a 19 530 is as big as will fit, up front, and it gives u added swingarm clearance that u WILL need.

Ok, great info guys now I can do some calculations. I'm at 1045 and the supercharger does come on hard mid throttle (cause its so big) and pulls forever so if I can get away with finding a 520 set-up I will, if not 530 it is. 520 will give me 1/8th more clearance over 530 chain so I will try.

18/38 is 2.1 FD
15/33 is 2.2 FD (stock)
19/45 is 2.37 FD
18/45 is 2.5 FD

Looking at these and everyone's comments I think the 18/45 @520 will be the best bet.

The std zed gearing is 2.2 to 1.
With 17" wheels the equivalent is 1.94 to one.
I run 530 pitch,5/8 offset with 19/40 gearing on my Drouin which works out slightly lower geared than std and rips my arms out on acceleration.
Going any smaller on the rear creates swingarm/chain clearence issues especially if using a deeper aftermarket swingarm.
Have a look at my Drouin build thread over on the Z1GB site for more info.

www.z1ownersclub.co.uk/forum/viewtopic.p...ostorder=asc&start=0

How do you guys go with wider rear wheels on the KZ1000?

I have seen the offset countershaft sprockets. But... The 630 chain seems to have about 0.38" inches clearance to the 120/90/18 rear tire, and about 0.25" inch clerance to the frame...

I would like to go with a 5.5 inch rear wheel and a 190/55R17 Rear tire...

I can move the rear sprocket carrier 0.25" inch towards the center of the wheel... However, it seems like there is not enough room...

120/90R18 is 4.72" inches wide
190/55R17 is 7.28" inches wide

That is about 1.28" inches wider to each side..

Am I missing something???

Luis

zed1015 wrote: The std zed gearing is 2.2 to 1.
With 17" wheels the equivalent is 1.94 to one.
I run 530 pitch,5/8 offset with 19/40 gearing on my Drouin which works out slightly lower geared than std and rips my arms out on acceleration.
Going any smaller on the rear creates swingarm/chain clearence issues especially if using a deeper aftermarket swingarm.
Have a look at my Drouin build thread over on the Z1GB site for more info.

www.z1ownersclub.co.uk/forum/viewtopic.p...ostorder=asc&start=0

Resurrecting this older thread (it has good information).

Im am stuck with the D&G 530 18T up front. So it I go 18/35 on a 17" tire would match stock but there is no way I can get away with that. The smallest R1 rear is 38 T. I wonder if the 38 will clear?

18/35 on a 17" = 1.94
18/38 = 2.11 +8% TQ
18/39 = 2.16 +12% TQ
18/40 = 2.22 +14% TQ (Fak! Thats going to be like 98tq roughly! - Top speed reduced to like 180-190kph.

What should I do here? If I need a 40 to clear the chain how buzzy will it be in 5th gear?

I'm pretty sure I have a 18/40 combo on my 1000 with a 160/60-17 tire. If I recall, I did the math and it was only slightly lower gearing than stock with the 18" rim/tire combo.

Later, Doug

StreetfighterKz wrote: I'm pretty sure I have a 18/40 combo on my 1000 with a 160/60-17 tire. If I recall, I did the math and it was only slightly lower gearing than stock with the 18" rim/tire combo.

Later, Doug

I was going by zed's recalculated 17" math if you use the standard 18" kz math 18/40 is pretty much the same.