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Cris89

Joined:

Jul 14

Posts: 1

Cris89 says:

Losing power and lots of oil coming out of the airbox

Hi everyone, my bike , GasGas Fse 450 has a problem and no one (even mechanics) know what could be. It's losing power and the engine oil is going out through the air filter. I've change the oil and have put the measure that the brand recommends 1200 ml and a new oil filter, i've clean everything and the oil is always comming out and the bike its clearely losing power.I don't see relevant quantity of smoke, just a litlle little bit when push hard the engine. Anyone with opinion? Sorry language mistakes.

Regards

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  • Posted 19 days ago (07 July 2014 00:06)

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oscarthegrouch

Joined:

Oct 05

Posts: 3109

compression test

it to gas gas spec then you will know whether its the combustion eg (piston) blowing the oil out of the engine (not good)

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jaffa90

Joined:

Mar 09

Posts: 8819

jaffa90 says:

Losing power

Welcome Cris89, (year younger than me I wish),

don`t know your bike, but oil in air box can be too much oil in the engine or wrong oil put in or a worn engine through lack of oil.

Oil level checks on most bikes is when cold but some after a run.

A dry and wet compression test should be done really.

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jaffa90

Joined:

Mar 09

Posts: 8819

jaffa90 says:

oscar

beats me again.:upset:

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oscarthegrouch

Joined:

Oct 05

Posts: 3109

but many

hands make light work :biggrin:jaffa

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kcmc

Joined:

Jan 08

Posts: 7174

kcmc says:

GasGas 450 year?

Hi Cris89 and welcome to the site :smile

As the guys have pointed out it's probably compression blowing by the piston compressing the crankcase and blowing oil vapour in excess into the airbox, could be a broken piston ring, excessively worn piston or cylinder bore, or damage to the cylinder wall. Also if it's had a top end rebuild or it's new and running it, if full synthetic oil is used the piston and rings may never wear in,  run in,  bed in,  and will blow by, quite common also with folks being too tentative running in engines with Nikasil  type cylinder bores. Good Luck

KCMC:tongue:

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ally600

Joined:

May 09

Posts: 2538

ally600 says:

dont know the bike

but my first port of call would be to check the crank case breather/hose is not blocked

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kcmc

Joined:

Jan 08

Posts: 7174

kcmc says:

GasGas 450 year?

Had a rethink (as ya do) if your engine has titanium inlet valve's ????(think it might) then they are worn out and will need replacing or you may have a broken inlet valve spring again allowing blow back through the injector body into the airbox.:hmmm:


KCMC:tongue:

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