Hi all

Hope you can help.

I have a XTM Mammoth which is about 4 weeks old. Its had about 7- 8 hours use so far and has been great.

Today it's started to accelerate badly. It makes a crackly sound as it pulls away then changes gear after about a second. I know that when it was running correctly it was taking about 4 seconds before it shifted into second.

From reading the manual i understand that i can make the gears shift in earlier or later but I dont think this is the problem because of the crackly sound.

Please help!!!!!!!!!!

Has it got a healthy about of smoke coming out of the exhaust????
Have you changed the type of fuel you have been useing????
Does it reach the same top speed it has in the past????

I did change the fuel type recently (from 20% to 25%) but it has been running on this fuel and correctly too. It probably would reach top speed but would take longer as its changing gear far too early and making the crackly sound.

Thought it might be the diff but the wheels do spin in the opposite direction. Cant see any chipped teeth on the gears etc either.

Any other suggestions?

The crackly sound might be because you are running it too rich.