1999 Fireblade

[Jonny Bravo]

Hello all, new to this. Just some advive please, purchased my blade last year when i passed my test. Quite high miles tbh but i thought oh well i love it. Done about 2500 miles last year with no issues considering it’d done 52000 miles at the time. All i did was change battery as the previous owner put new tyres and pads on. New season, dropped oil and put in new oil/filter etc. New plugs, air filter and pads all round. Changed battery to a gel, everything cool. Not gunna bore you but started having trouble, changed stator, and regulator blade is on fire not missing a beat up to now. A few times lately on start up a loud bang/junt around engine i suppose and won’t start. I leave it a mo and then it will fire up but sounds like firing on 3 cylinders and then goes ok. It’s not leaking or burning oil, no smoke, no loss of power, everything is good. Anyone help please cos I haven’t got a clue at all

[Mississippi Bullfrog]

Check the plugs, see if one is looking different.  That sounds like a fouled plug isn't firing the rich mix from start. The unburnt fuel is then backfiring, possibly through the carb. 

[Jonny Bravo]

4 hours ago, Mississippi Bullfrog said:

Check the plugs, see if one is looking different.  That sounds like a fouled plug isn't firing the rich mix from start. The unburnt fuel is then backfiring, possibly through the carb. 

Thanks for that I appreciate it

[Jonny Bravo]

I am just wondering if I shouldn’t of put NGK iridium spark plugs in . Should i also change the leads and revert back to the original NGK plugs, obviously a new set………….Mmmmmmh

[Mississippi Bullfrog]

Nothing wrong with iridiums. I use them in my bikes. 

 

Leads don't last forever so no harm replacing them.