Transalp xl600v flat spot

[petterdiesel]

Hello,

My bike is suffering from a flat spot between 5 & 6000 rpm when acsellerating and on engine breaking the bike backfires a little, its just had a full service and i have been using ron 97 fuel most of the time. Forgot to add, the chokes and cables have been removed, greased and are working....

can anyone help??

Churs
Pete

[Kakugo]

What mileage is the bike? Is continous or just comes and go? Could be quite a few things, from water in the carbs to a loose carburettor funnel, need more datas...

[idefix]

Maybe silly to say this, but did you replace the airfilter at that service. I changed the filter after a year and it helps quite a bit on response. Why you wanna go above 5000 rpm ? 3000 - 5500 works fine for my 600 .. how fast you go then ...

[petterdiesel]

Maybe silly to say this, but did you replace the airfilter at that service. I changed the filter after a year and it helps quite a bit on response. Why you wanna go above 5000 rpm ? 3000 - 5500 works fine for my 600 .. how fast you go then ...

Alllo, Good suggestion, the filter looked ok, I will replace it and see how the bike runs then. Thanks

[petterdiesel]

What mileage is the bike? Is continous or just comes and go? Could be quite a few things, from water in the carbs to a loose carburettor funnel, need more datas...

Alllo, the bikes done 35k miles, its not continuous, feels like a fuel blockage or maybe flooding.....

[petterdiesel]

Maybe silly to say this, but did you replace the airfilter at that service. I changed the filter after a year and it helps quite a bit on response. Why you wanna go above 5000 rpm ? 3000 - 5500 works fine for my 600 .. how fast you go then ...

I might have been a little over the speed limit..... 85/90mph, on the motorway of course...

[Kakugo]

Clogged air filter was my first thought. Could also be a little water in the carbs (a droplet is usually enough to cause troubles), a clogged fuel filter (it takes really minutes on an empty tank)... if it goes away by itself or after an air filter change there's nothing to worry about.

[raymo]

the old 600s are prone to a flat spot abput 5000 I notce my went when i fitted a lazer pro end can.. are you running the original system?

[petterdiesel]

Hello All!!

I tried the easy option first, (Redex Petrol) and its worked!!

The bike struggled for the first 10 mins whilst the redex went thought the system, then I took the bike for a short run and the flat spot has gone!!

Trust Red!!

Churs for the advice!!

Pete.

[raymo]

The dreaded redex.. good stuff but can do some mischeif as it burns real hot.. watch your oil consumption as it may have freed up the piston rings a litte hopefully ok.. I used it on an old 850cc mini years ago kill or cure.. even shot some direct into the bores the smoke was horrendous.. worked though..