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Discussion Starter · #1 ·
ok,

2004 R6, put my jardine can on at 1000 miles, been running fine now at 8k miles. It seems as if the engine is laboring harder to get the same amount of power even slightly less power. I've also been getting alot more backfires than I did originally. i thought it might be the sparkplugs but a friend told me thats probably not the problem and to put some engine cleaner stuff into the gas tank.

anyone else have similar problems?
 

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63 Posts
Discussion Starter · #5 ·
i guess as far as the tune-ups I've been doing the oil filter and oil everytime but really havent gotten proper maintenance on it which is probably the problem. I'm gonna get proper service done shortly as far as valve re-adjustments etc, thanks for the tips.
 

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I had the same problem with my bike (or what I thought to be a problem) till I went to track day. It seemed like all the bikes there that were running aftermarket cans were "backfiring" under engine braking. This was explained to me as being normal..... and it really isnt backfiring..(this is done with a carburated motor not fule injection)... it was explained like this... the stock can has a certain amount of baffling so usually under serious engine braking it has enough back pressure to made the "normal" sounds.... but the after market cans have even less so there is less back pressure when you let off the throttle and it sucks it back in and causes the sounds like a backfire.... some aftermarket cans do this more than others... why your bike seems to bog down, I am not really sure except I would guess that your bike is fuel injected so I would try a power commander and run a map to match your mods. I run a yoshi RS3 race can and it really doesnt make that sound when i let off the throttle at high RPMs..... I don't think you have to due a valve adjustment till around 24k miles..... but you could change out the spark plugs as sometimes when you make mods and don't run a PC it will burn rich or lean and can foul up the plugs...... so I recommend checking the cheaper things first till you find what is causing the problem..
 
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