Borring out pot to 56mm from 54mm do i need to change my jets in my carb and wat are the ajustments

The jets probly need ajust. Ucud hav dirty aircleanr causin them to clog. Also chec floatlevel setting. Buy a clymermanual for total repair&rebuild for that model

Jets probly need pro ajustment..doin it w out xperienc can burn the engine.

Fixed jet carbs are always a problem due to tollerences within the engine, fuel types and carb wear, which you cannot make a small ajustment to the carb to compensate for, you need to check the cylinder and piston are in good condition and has ample compression, if ok you may need to change the carb.

ok u have better fuel flow with the shortened exhaust you will most likely need to go up a main jet size ur running with too much air in ur mixture running hot and the backfires are when u get to top of ur gear range its starveing it of fuel runing too hot the exhaust is geting super heated and the backfires are as u decelerate right ? thats unburnt fuel hiting ur exhaust and going bang u may even notice flames at exhaust tip the new slightly larger main jet shuld fix this you may have to ajust the main needles up or down to compensate for the jet change asumeing they are adjustable the pilot jet shuld be fine no need to touch anything there

ok so as u running now ur fuel cat emission thing eats petrol and vice versa over fuel a lot the cat will be overwelmed and get eaten by the fuel ur at the other end too much air cat wont be effected but as ur running much hoter then needed your basicly eating your engine from the inside out from the aditional air the new main jet will allow more fuel from the start of midrange to top end u shuld find after this fix the bike will run stronger and faster and cooler from 600 rpm up primerily more at top end

the main jet is the fix as far as i see it but like i say ajusting that to allow more fuel means u also effect midrange to have more fuel more so the more u open the accelorator so you may need to make a minor adjustment positioning ur needles prehaps 1 clip up putting the needle its self a bit closer to the jet thus giving less fuel thats if you have ajustable needles if not u cant ajust midrange but to be honest just that pilot jet shuld put u so close to right u may not even need the midrange ajustment try it 1 size up on all main jets its at the least a big step in the right direction if not a total fix

hope this helps

I have changed block of tvs victor gx and timing chain also but there some sound come from engine

if its factory jets then there just dirty or need ajust--bigger ones can be risky cause tuning them wrong can burn ur engine--bike is 30yrs-bout time for carb rebuild--buy a haynes or clymer book for maintenance details

may need the float level and jets ajusted-ull need a clymer manual

better look at carb-probly medium n hi jets need ajust-and shud hav a pro do that cause to lean or rich can ruin the engine--buy a clymer manual-it explains kawa carbs well

Most carbs are not adj, the jets are fixed in position, and in order to change fuel air mix, you have to change the jet. You could try high test gas, clean the air filter, get some hotter plugs in there. What is your elevation? All this will change the fuel/ air mix.

jet work is very touchy science-hopefully u had a pro perform it-incorrec ajust can fry an engine-inspec ignition to rule out electrical--r u gitten gas from tank