Lots of people have helped me before and i have decided to take my bike into the garage.
the problems have been backfiring, lack of performance, and only getting 80mph, in 4th gear all the timeand throttal allways at fullest after 4th gear.
1st thing the mechanic said was that my bike was not running on all cylinders. He said xj's are a bit blug blug (engine noise) but he could hear the engine did not sound right.
what could this meen. they are starting on it on Sunday, but at £40 an hour i wondered if anyone could tell me what he meant by not firing on all cylinders.
xj600n
1998
35k
2007-06-23 01:12:57 · 5 answers · asked by andy m 1 in Cars & Transportation ➔ Motorcycles
starts up fine, runs ok, just lack of power and slight backfire in right exhaust. i have no service history on this 35k miles bike
2007-06-23 01:45:02 · update #1
not firing on all cylinders - 4 (?) pistons lined up acroos your motor, all firing in sequence. 1 or more pistons are not firing, could be electrical, (lack of spark, wrong leads to spark plugs) could be fuel delivery(blockage, bad carbys, fuel flow diaphram from tank), probably couldn't be much else or your motor would not kick over at all. Should not be hard to track down if they know what they're doing. Have a look at this link it has a lot of info and should help you understand what his talking about. Good luck http://www.dansmc.com/MC_repaircourse.htm
Sounds like the carbys (assuming its not fuel injected)
2007-06-23 01:39:08 · answer #1 · answered by xjr1300 4 · 0⤊ 0⤋
It will be simple. Something as innocent as one drop of rainwater on an LT or HT lead that goes to the spark plugs can lead to that plug not firing. The shop will basicaly do a service to your bike which will include spark plugs and setting the valve clearances. Nothing major to worry about XJ engines are very tough and very reliable when serviced reguarly.
2007-06-23 09:05:05 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Going threw the carbs made all the difference in the world on my seca. If you are mechanically inclined at all you can pull the carbs off, clean and adjust them and have them back on in an afternoon. Look in the yahoo Seca groups and there will be a pdf called "10 cent rejet" It will show you step by step what needs to be done. If you can't find it I can email it to you.
If you decide to do it inspect the rubber boots the carbs mount into. All of mine were dry rotted and cracked/leaking.
2007-06-23 11:28:55 · answer #3 · answered by kb 3 · 0⤊ 0⤋
Could be a burnt valve, worn plug, the list is endless.
I had a similar Divvy with the same mileage and although the performance was better than what you're getting the piston rings were badly worn (lots of blue smoke) and the cam chain was worn.
2007-06-23 18:21:05 · answer #4 · answered by Bandit600 5 · 0⤊ 0⤋
Tell the mechanic to perform a "leak down" test.
If he's competent, he'll know what you're talking about.
A leak down test checks for valve leakage.
A common problem on a bike with that many miles on the odometer.
2007-06-23 13:57:01 · answer #5 · answered by guardrailjim 7 · 0⤊ 0⤋