2001 gas gas exhaust getting red hot very quickly and not running well

[Craigop]

Hi, 

recently bought a 2001 gasgas 280txt as bait if a project. Will start but doesn't run very well or rev very high and doesn't run for long before exhaust is glowing red hot. Have stripped and cleaned carb and air filter.

Any ideas what it could be?? 

Thanks 

[feetupfun]

A very hot exhaust header and poor running can be caused by the ignition timing being set too late

[Craigop]

Thanks. Flywheel off and adjust is it? Easy todo? 

Cheers

 

[b40rt]

Check woodruff key is present and correct. Look for tell tail marks on the back plate indicating its been move, or original position.

[Craigop]

Will check this later this afternoon 

thanks 

 

[misscrabstick]

Lean mixture or retarded timing, probable the flywheel key has sheared and retarded the ignition timing because the flywheel has moved around the crankshaft.

[d2w]

This is a pretty basic one ... and it's somewhat speculative on my part ... but could a partially plugged exhaust system account for the symptoms? Perhaps the exhaust gasses are not exiting the pipe well enough? Has somethings plugged and/or restricted the exhaust?

Edited May 18, 2019 by d2w

[Craigop]

Woodruff key had gone, thanks all. New one ordered, hopefully be runny fine in few days 

thanks 

[thai-ty]

On 5/18/2019 at 9:04 PM, d2w said:

This is a pretty basic one ... and it's somewhat speculative on my part ... but could a partially plugged exhaust system account for the symptoms? Perhaps the exhaust gasses are not exiting the pipe well enough? Has somethings plugged and/or restricted the exhaust?

Concur.

I'd check this as well.