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sprocket ratio asssistance

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06 Sep 2021 13:57 #854920 by TexasKZ
Replied by TexasKZ on topic sprocket ratio asssistance
Did you check for proper clearance between the new bearings and the cam journals?

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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06 Sep 2021 15:11 #854928 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
No I did not....

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06 Sep 2021 15:46 - 06 Sep 2021 15:51 #854930 by Injected
Replied by Injected on topic sprocket ratio asssistance
You never mentioned if this bike was air shifted, if it has a slick or bar, what RPM your leaving at - These all make a difference at the finish line. As far as the original question I believe most guys are running a 15/36 combo (that's how mine is geared)

Also it sounds like your not hitting it hard enough off the line.
Last edit: 06 Sep 2021 15:51 by Injected.

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06 Sep 2021 17:09 #854933 by TexasKZ
Replied by TexasKZ on topic sprocket ratio asssistance

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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06 Sep 2021 18:22 #854940 by urankjj
Replied by urankjj on topic sprocket ratio asssistance
If you are hitting the traps @ 97mp, but the bike is still pulling then something is missing. Air box or pods ?... main jet size ?... petcock delivery ?... rider in excess of 300 lb's -(just kidding).  Good Luck to you.....

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07 Sep 2021 07:44 #854954 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
HEY,  i,m not an ounce over 270 lbs.!! LOL

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07 Sep 2021 07:47 #854955 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
Yes air shift, slick and bar. Im still learning to launch the bike i am not leave hard at all, which im sure are all factors. Now the engine is back out i believe my biggest problem right now is missing horsepower, gotta get that corrected first.

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07 Sep 2021 08:23 - 07 Sep 2021 08:25 #854956 by Injected
Replied by Injected on topic sprocket ratio asssistance
If you have a slick and bar setup there should be no issue launching at 6K or above, with a small motor you want to keep the RPMs up there.

You said it was a purpose built bike but no mention of a lockup clutch?
Last edit: 07 Sep 2021 08:25 by Injected.

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12 Sep 2021 15:26 #855182 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
No lock up clutch. Sent the head to FBG for valve job. #3 cylinder was down to 90 psi. Found my horsepower loss. Hopefully back to the track by mid October.

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12 Sep 2021 18:22 #855192 by Mikaw
Replied by Mikaw on topic sprocket ratio asssistance

No lock up clutch. Sent the head to FBG for valve job. #3 cylinder was down to 90 psi. Found my horsepower loss. Hopefully back to the track by mid October.
What did you figure out with cam bearings?

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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13 Sep 2021 02:22 #855201 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
Well the cam bearings. Seems i have two different manufacturers of the bearing mixed together. There is a definite difference in the quality of the bearings. As i recall i had to buy from two different places to get a full set of bearing. Knowing what i know now i would have left the originals in the engine, guess its all part of the learning experience. Best you can do is learn from your mistakes and move forward, I am definitely going to check the clearances when the head gets back from FBG.
The following user(s) said Thank You: Mikaw

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01 Nov 2021 02:39 #857248 by Southpaw
Replied by Southpaw on topic sprocket ratio asssistance
Well,
Got her back to the track last weekend. Did not change the gearing at all. But did put in cam bearings and had a valve job done. First pass i finally broke a 100 mph barely but i broke it. Still not very smooth of a run, so i decided it was time to turn on the autoshift and see if its me or the bike. Well its me. Autoshift made a world of difference, made a few more passes to get the autoshift dialed in last pass of the day i hit 103.44mph. With that straightened out i was able to start paying attention to what the bike is really doing. Found it not shifting into 5th until nearly the finish line so gear change is definitley in order for next year. Gonna be a long winter. Thanks for all the help and words of encouragment!!
The following user(s) said Thank You: slayer61

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