vacuum leak

chaco · 07-08-2015, 07:36 PM

how do I check for a leak.

Shadowfire · 07-08-2015, 08:50 PM

Spray starting fluid around where you suspect there is a leak. If the engine speed changes, you have a leak.

chaco · 07-08-2015, 09:46 PM

I can't get the bike started though. If the cvt belt is off it will work normal???❓

blueboy5000 · 07-09-2015, 06:06 AM

No. Without the bike running, it's not producing vacuum, so there is no way to check.

Don't run the bike without a cvt belt the cvt acts as a counter balance for the engine. Running an engine with no cvt can damage the bearings and other engine components.

bull · 07-10-2015, 06:17 AM

Testing for a vacuum leak can be done with the engine off, but requires a piece of equipment called a "smoke machine" which is outside the tool set most scooter owners would have.

As to running an engine w/o a cvt belt; IF the only item on the crank on the cvt side is the starter gear, fan and retainer then it will do no harm to the engine as that is the same a testing an engine on a stand. However IF you have the engine variator components installed and do that, yes damage will be a result.

chaco · 07-11-2015, 08:09 AM

You mean like the variator and the dollars?

07-09-2015, 06:06 AM	#4
blueboy5000 Join Date: Jul 2011 Location: Connecticut Posts: 493	No. Without the bike running, it's not producing vacuum, so there is no way to check. Don't run the bike without a cvt belt the cvt acts as a counter balance for the engine. Running an engine with no cvt can damage the bearings and other engine components. __________________ 2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats.
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07-08-2015, 08:50 PM	#2
Shadowfire Join Date: Feb 2015 Posts: 121	Spray starting fluid around where you suspect there is a leak. If the engine speed changes, you have a leak.
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07-11-2015, 08:09 AM	#6
chaco Join Date: Jul 2015 Location: Aberdeen , Maryland Posts: 21	You mean like the variator and the dollars?
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