Bad Backfiring after Valve Cover Gasket Replaced

Mac55 wrote: I had the cross wedge type, got it reset and everything is running well. Took it out for about 3 hours last night and so far no fresh oil on the engine which is better than I could say before.

One question I do have is could replacing that gasket affect performance? I've noticed a huge difference in how the engine feels when accelerating and I have a lot more pull in 4th and 5th than I did before. I don't understand how just messing with the valve cover could have affected performance that much though. I just did it because I suspected it was leaking oil. Any ideas?

Sure! A properly adjusted cam chain could make that difference.
Bill

Did you change the cam timing? I didn't think you did. The gasket thickness won't change timing by any amount that can be felt in performance.

If the timing was off by a tooth, and you re-timed it, then it will make a difference.

If the old valve cover gasket was torn and air was leaking into the air suction ports, that would cause the backfires, but won't affect performance. (It affects combustion in the exhaust system, not inside the cylinder.)

It could be you had some bad connection at the coils or other wires, and you disturbed them somehow.

Alright, new concern. When the engine hits about 4-5000 rpm it sounds like the cam chain is hitting the engine casing or something like that. I've noticed no difference in performance since I did everything else, just the sound, which just started. Is it possible the tensioner didn't reengage correctly when it was reset? Should i be concerned? Going to take the whole assembly off and make sure it's clean and working later today hopefully but wanted to see if anyone has any other ideas.

Also does anyone know where I can get more information on the '83 750 F1? I have the Clymer for all 80-83 KZ 750 twos and fours but as far as ive seen they don't even mention the F1 in the book despite it being an '83 four.

It should say what models are covered on the outside rear cover of the manual
Pete

No eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationYou really need to buy a Kawasaki Service Manual rather than aftermarket junk manuals. The part number for the KZ750-F1 manual is 99924-1035-03; the part number for the KZ750-F1 Owner's Manual is 99920-1183-01. Ed

99924-1035-03




99920-1183-01