Triumphrat

Mike The Bike

The 1999 1200 is driving me nuts. Please help.
It misfires at most revs.

No 1 2 &3 plugs are O.K. but a weak colour but No 4 is black.

I cleaned all the lines.& filters.
Fitted new rubber carb manafolds.
K&N filter
New plugs
New coil
new leads.

I bought the coil and leads to solve this problem.

Anyone got any ideas?

Meanwhile i will strip the carbs again and clean out the pilot jets again.

Thanks in advance for your hepl!

Mike

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1977 KH250.1992 TROPHY 900,1996 TROPHY 1200,
1996 PBR MONKEY BIKE 160cc,
1998 SPRINT 900,2007 SPEED TRIPLE 1050.

Mike The Bike

As the problem is with No4 I tried to remove the floatbowl still whilst on the bike. No luck so I took off the top cover to discover the spring was not seated properly.
I fixed it in place, and sacked my helper."nothing is my fault".
The bike runs but still has some poping now and again. Im going to give it a good run and see what happens.

Mike

__________________
1977 KH250.1992 TROPHY 900,1996 TROPHY 1200,
1996 PBR MONKEY BIKE 160cc,
1998 SPRINT 900,2007 SPEED TRIPLE 1050.

Mark62

Sounds like you are on to something. Since you had the carbs a part did you syncronize them? If the grips are "buzzy" at speeds then you really need to sync the carbs.
My 1200 pops when cold.
Mark

__________________
We can put a man on the moon, but concrete and asphalt cannot be made to meet evenly.

gamsa

My 900 pops a little on the overrun, but I do run it rich (bottom clip on the carb needles).