[carl465]

Hi, I am a new burgman man having bought one yesterday.
Unfortunatley after 100 miles on the motorway (not thrashing it) i filled up with gas and resumed my journey only for the bike to lose power and refuse to rev. pulled over, checked oil, fuel, brakes etc. bike will start and idle, very roughly but will not rev. did eventually pull away and rode 5 miles at 20mph to escape the motorway but had to abandon and recover. Started first time the next morning but will not rev.
So far i have checked fuel pump, spark plug, air filter, carb diaphram & manifold, jets, cables, all are working or ok.
Plenty of suction at manifold. The engine sounds loud, rumbly tho not sure if this is drive noise. starting to suspect deeper engine problem but living in hope a diagnostic wizard will shout out before i start a depressing stripdown.
Having said that, first 100 miles were fantastic and i'm hooked.
Any ideas ? ? ?

 

[NormanB]

Check throttle control at the carb itself and that you have full range of movement.
If that is OK I would do a compression test.
Next drain the oil out of the sump and confirm it is only oil and not an engine flying in loose formation in the drain tray. :lol:

Welcome to the forum :hello2:

Please update your location in your profile.

 

[Duster]

If he had the kickstand down to fuel up, the plunger in the
kickstand safety interlock switch may be causing a problem,
or will this result in only a transmission-shifting issue??

 

[NormanB]

Kickstand has no effect on the mechanical cvt of a 400.

 

[carl465]

Hi Norm, thanks for the prompt reply, yes all the cables and actions are correct, checked tappets but now think it is deeper down, big end or worse.
Am waiting for a w/shop manual to see what i'm up against as there don't appear to be many replacement engines about.
Anyway thanks for the advice and i'll get into the site as it looks like I'll be cage bound for a few weeks, L&R, Carl.

 

[model28a]

NormanB asked and you obviously read it as you thanked him for his reply. But if you put your location in your profile someone near you may offer to take a look at your scooter and help find your problem. I will never understand is if people come to a forum to make like minded friends, and/or get help I would think your location and the year and mileage of your ride would be an important part of your profile. :? :roll:

 

[Duster]

Kickstand has no effect on the mechanical cvt of a 400.

Yep...thought he had a 650....Old Timers disease showing up again..

 

[NormanB]

Hi Norm, thanks for the prompt reply, yes all the cables and actions are correct, checked tappets but now think it is deeper down, big end or worse.
Am waiting for a w/shop manual to see what i'm up against as there don't appear to be many replacement engines about.
Anyway thanks for the advice and i'll get into the site as it looks like I'll be cage bound for a few weeks, L&R, Carl.

Take the top of the carb off and check the air slide has full travel when you operate the throttle and that there is no 'lost motion'.