Maybe another reason for hot start problems ???

[Mori Man]

Both my ZXR's with full length cans on ( free flow ) have never had problems starting up hot or cold , the M1 is marginally better than the J as it catches on first dab of the button.

So, I've been working on my ZRX - it's being neglected with working on the M1 and using the RG as my daily hack.

I've fitted up the carbon can that was on the J but the link pipe doesn't slide deep enough into it and fixing was wobbly. As a quick bodge I prized the outer baffle away from the can cap so the link pipe could slip between it and get a better fixing

All worked well for just a temporary job

However , once warm the bike is an utter cow to start It takes almost full throttle to get it to catch where it used to just fire up on the button. so giving the free flow system a slight restriction at the can has created this problem

So I was wondering if folks on the ZXR experiencing the same thing have tampered with or have exhaust systems that have been modified from original design ?

Having never run the bikes with OEM systems on them I can't make a comparison to that but pretty sure the J was difficult to start with the MotoGP can on it - not that I removed it for that reason just it was too darn loud for road use

[CaNsA]

I had some hot/warm start probs with the 1st zxr400 i owned a few years back. I got round it by fully opening the throttle and slowy rolling it off over about 5secs, then the bike would fire up straight away.

I've not had any starting probs with this one, the one i bought off martin a couple of years back.

Its a funky thing :/

[R P Corse]

The only hot start problems I've had are down to the battery and reg/rec...

As a thought.... What about using colder spark plugs? Surely that would help a little? CR10EK or something like that?