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Post by stancejontland on Feb 10, 2018 19:31:34 GMT -5
Can anyone give me a parts list and pictures also with where they got everything? Or can i buy a compression tester or rent one from a parts store.
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Post by pinkscoot on Feb 10, 2018 19:47:18 GMT -5
You can buy or rent them from a parts store, make sure you get the correct adaptor for your spark plug hole. Do not buy the Harbor Freight one, they are notoriously bad.
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Post by stancejontland on Feb 10, 2018 22:45:20 GMT -5
Will they have adapters there at the parts store?
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Post by ThaiGyro on Feb 11, 2018 0:43:11 GMT -5
Most I have seen, If made for scooters/motorcycles, come with adapter for long reach plugs, a spacer. Just make sure that it's threads extend the same as your plug threads.
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Post by stancejontland on Feb 11, 2018 1:56:20 GMT -5
I dont know if my local parts stores carry motorcycle / scooter specific compression testers. Ill just take a plug in with me to double check
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Post by 90GTVert on Feb 11, 2018 7:30:22 GMT -5
I bought it on amazon, but local Autozones did carry Actron products last time I looked : amzn.to/2soptuwDoesn't have to be that one exactly or that brand though. Look for one with a 14mm adapter (should list on package) and it should work. I'd imagine most parts stores would have something. |
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Post by stancejontland on Feb 11, 2018 17:09:02 GMT -5
ok so you think 14mm would be the size of the plug? well at least for the adapter. i have the 139qmb i think??
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Post by 90GTVert on Feb 11, 2018 21:18:32 GMT -5
139QMB is a 49cc 4T and uses a 10mm adapter. C begins the spark plug code for NGK plugs and denotes 10mm.
1E40QMB is a 49cc 2T and uses a 14mm adapter. B starts the NGK plug code and denotes 14mm.
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Post by stancejontland on Feb 12, 2018 1:08:05 GMT -5
Ok i have the 1e40 then. So just make sure i get 14mm adaptor with it? I got my new exhaust and it didnt fix my issue. I doubt you remember my posts about it but just checking compression to narrow things down.
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Post by 90GTVert on Feb 12, 2018 7:40:54 GMT -5
Yeah, 14mm adapter.
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Post by stancejontland on Feb 12, 2018 12:29:22 GMT -5
So all i do to test compression is hook everything up. Hold throttle wide open at start it? Do electric start and kick? Also do you know what would be normal psi for my engine?
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Post by edwardtennant on Feb 12, 2018 14:10:12 GMT -5
To test compression, connect the gauge snugly to the spark plug hole, then hold the throttle Wide Open and try to start it on the electric start. Stop when the gauge stops going up.
For a 139QMB minimum is around 90PSI, below that you will begin to have issues , good is around 110 PSI, Great is over 120PSI
Not sure if it is the same for your 2 stroke motor, but should be similar
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Post by stancejontland on Feb 12, 2018 14:18:30 GMT -5
I have the 1E40QMB engine.
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Post by 90GTVert on Feb 12, 2018 14:27:39 GMT -5
WOT, e-start or kick... whatever gets the reading higher, and hopefully you'll see 120psi or more.
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Post by stancejontland on Feb 12, 2018 15:22:02 GMT -5
Ok say i dont see that. What could be going on then? Bad seals?
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