Going up 2 on the main jet as a last resort Z500b

[Dabura]

The z5 hasnt been running right so stripped the carbs(tk22s) down for a nice clean. Went to put them back together and snapped the main jet

After 2 hours searching i can find a replacement #90 on its own and all the replacement kits have a #92 main jet in them(for the kz550) it doesnt help that i dont have a proper part number, its 92063-xxxx

So would going up and putting #92 mains in all four carbs be a bad idea? Its all standard except for a aftermarket pipe which is no way performancey.

Any help appreciated
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Past: Peugeot Speed Fight 50 - couldn't handle winter.Gilera Sc125 - Crashed and burned(literally).Aprilia Rs125 - Fell apart and Sold. Mk1Bandit Stolen

Present: Kawasaki Z500-B

[stinkwheel]

Could you get smaller ones and drill them out (you can buy jet drills)?

Although going up 2 probably isn't the end of the world on a bike of that era.

That said, even wemoto are listing #92 jets for your bike. Sure it's supposed to have 90s in it?

The best bit will be when you find it was running badly because of a poor coil earth or similar.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Dabura]

Coils were brand new when the bike was rebuilt last year as were the plugs leads and caps.

buying smaller wouldn't be a bad idea however teikai jets seem few and far between

i looked at the wemoto listing amongst others and they all have 92 - 94 mains which is for the 550 and 550-d flicking through KZ riders boards 90 is the right size. the 550 was the main model so there is an abundance of spaces but the 500 was only made for 3 years. even seen the 92s marked as replacements for the z400 which i cant believe.

how difficult would drilling out a smaller jet be? would it be worth fitting 92 and sticking a free flowing filter in and/or modifying the pipe or would i need bigger pilots,needles and even more cocking around.
____________________
Past: Peugeot Speed Fight 50 - couldn't handle winter.Gilera Sc125 - Crashed and burned(literally).Aprilia Rs125 - Fell apart and Sold. Mk1Bandit Stolen

Present: Kawasaki Z500-B

[Rogerborg]

I'd expect #90 to #92 to be within the margin of manufacturing error, fuel quality[*], altitude, air temperature, humidity and density.

Carbs aren't an exact science, and I'd rather be running a touch rich than too lean.


[*] Designed for (e.g.) leaded 2 star, running on some ethanol secret-sauce.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[stinkwheel]

*Initiates badly dubbed lip-synch*

Of all the styles, my google-fu is the most powerful.

https://www.motorradbay.de/kym01bxxx-c-207_312_315-6.html
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Dabura]