VM29 Smoothbore slide setup

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Re: VM29 Smoothbore slide setup

27 Jul 2026 09:00
#926165
Sorry I thought we were talking about the 33's. The air jet has a big influence on off idle take off, I'm going a little larger on my 33's due to poor mileage. 

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  • Kawboy74
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Re: VM29 Smoothbore slide setup

27 Jul 2026 10:50
#926169
Thankyou all for very useful information, my Sudco/Mikuni book seems to be the same for a lot of those specs. I may try a 117.5 main later but at this point in time I’m going to delve into the linkage recommendations as if idle screw won’t let it it come down there is a setting issue somewhere. Should the pilot used be smaller as stated by WG or have people had success with book specs?
Thanks.   David
1974 Z1A As original as I could get it
'88 ZX750R braided lines, mostly original
KZ1000 project on the bench
Burlington,Ontario,Canada

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Re: VM29 Smoothbore slide setup

28 Jul 2026 03:37
#926184
If it helps. GD4now correctly mentioned the use of similar cross-over similar slide lifter from the 1976-77 VM26mm used on the KZ900. They are a bit more complex then needed and require a different method for syncing each slide. Also the 2-piece pot zinc pieces can get galled/bound resulting in bind and slide not fully seating. Note the spring between the 2 pieces.     One shown doesn't have the locking set screw plate but it goes under set bolt and adjust screw but only tabs up on set bolt. If someone mis-adjusted/fiddled with the set bolt this too will cause slide not to seat correctly.  

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Re: VM29 Smoothbore slide setup

19 Sep 2026 13:12
#927708
I have resumed my search on carb issues with my 29 Smoothbores. I have found that sadly mine are the Suzuki-prep model so I have the 2.0 cutaways. I tried the carbs after syncing again and utilized the Kawasaki recommended adjustments however I was stuck exactly at just under one turn out of the air screw with poor running adjusted anywhere else, generally at idle and low speed. I tried google/AI for a recommendation and found the recommended starting point was where I was jetted and adjusted and it was stated that 1/8 to 1/3 throttle would be an issue keeping the 2.0 cutaway slides. As the bike pulls very well above that I decided to try a one size larger pilot, (27.5) and one size larger main, (122.5) to see what changes I would experience. Does this sound like a feasible course to run with the previous tuning issues, if not does anyone have 1.5 slides available as Z1 Enterprises is the only outlet found at 4106 each x4 x 1.5 and shipping to due exchange?
Thankyou all
1974 Z1A As original as I could get it
'88 ZX750R braided lines, mostly original
KZ1000 project on the bench
Burlington,Ontario,Canada

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