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Post by Scootrific on Sept 18, 2016 9:36:52 GMT -5
Today I changed my scoot´s clutch and made a clutch bell holding tool.
So now I have saved 24€ workshop money and can put that to other use.
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Post by Scootrific on Sept 19, 2016 6:20:56 GMT -5
Today I checked my scoot´s engine code:   Also I changed the engine oil:  Here is the old and new oil side by side:  |
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Post by aeroxbud on Sept 19, 2016 9:48:26 GMT -5
Will run a lot better with new oil. It feels good doing jobs yourself, and your saving money too  |
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Post by Scootrific on Sept 19, 2016 12:12:32 GMT -5
Yeah, by saving money, I can put that to other use, like I can buy parts or paint etc.
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Post by Scootrific on Sept 19, 2016 13:00:06 GMT -5
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Post by Scootrific on Sept 20, 2016 2:39:50 GMT -5
Stage 1 painting job finish on daylight:   |
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Post by Scootrific on Sept 20, 2016 6:15:21 GMT -5
My future plan for the scoot is to go from 50cc to 90cc.
Do I need to change these parts?
CRANKSHAFT
CAMSHAFT
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Post by 90GTVert on Sept 20, 2016 14:44:41 GMT -5
You don't HAVE to change out the crank for that kit... but it's likely to fail. I'd suggest a quality replacement. The cam is your choice. Might get some more power out of the cam, but piston to valve clearance should be checked.
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Post by Scootrific on Sept 21, 2016 4:05:24 GMT -5
You don't HAVE to change out the crank for that kit... but it's likely to fail. I'd suggest a quality replacement. The cam is your choice. Might get some more power out of the cam, but piston to valve clearance should be checked. But that is a Big Bore Kit of cylinder + head with valves. Other things I will change the CVT components from original to Sport and maybe put a new carb too. Tires need to be changed too, but the tire choice is blury. Kenda K701 Allwetter 3.50-10 56L M+S tire
Kenda K701 3.00-10 47L M+SKenda K324 3.00-10 |
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Post by 90GTVert on Sept 21, 2016 9:20:05 GMT -5
You don't HAVE to change out the crank for that kit... but it's likely to fail. I'd suggest a quality replacement. The cam is your choice. Might get some more power out of the cam, but piston to valve clearance should be checked. But that is a Big Bore Kit of cylinder + head with valves. They get ruined just like any other head and piston if the cam timing or lift allows for piston to valve contact. It's likely fine, and most never bother to check, but that's a $300 kit. I'd at least rotate the engine over by hand with the spark plug out when it's installed and make sure there's no evidence of P2V contact near TDC. 49ccscoot.proboards.com/thread/15714/piston-valve-clearance-info-checks |
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Post by Scootrific on Sept 22, 2016 3:16:27 GMT -5
90GTVert OK. I think I would try to do my first Cylinder change, because then nobody knows, that the scoot has 89cc cylinder kit on it. The law says, that 49cc and 50cc - do not need licence, but over that ... well yeah. I looked the crankshafts and there is 2 different available for my scoot 50cc to 89cc engine build. One is with 16 tooth and second 22 tooth. What does that mean? Is it linked to the camshafts chain? I think I should change that too just in case, to make sure, that the crankshaft can handle the 89cc power.
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Post by 90GTVert on Sept 22, 2016 6:35:08 GMT -5
16T and 22T designations on crankshafts refer to the oil pump gear. You need to know which you have before you choose a crank. As I understand it, the 2 pumps are different so you can't just buy a new pump if you have the other style. I think the 16 is more common, but you'd save yourself some potential headaches and wasted money by taking a look. The side cover behind the stator would have to be removed to see.
If this is your first cylinder change, maybe you could try a cheaper build that will still give you a big boost and use a 47mm big bore kit. It's way less hassle, because you shouldn't need to change out the crank right away if yours is in good shape.
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Post by Scootrific on Sept 22, 2016 9:22:33 GMT -5
Then I thin, I´ll go for 47mm x 13mm 72cc - GY6,139QMB QMA kit
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Post by Scootrific on Sept 23, 2016 11:16:50 GMT -5
90GTVert I found a good picture from cylinder size. When I´m going to choose the Big Bore Kit, then witch of the numbers I should take to account, when buying the kit?
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Post by 90GTVert on Sept 23, 2016 14:58:57 GMT -5
If it's for a 139QMB, it should fit. The main hangup is usually if the cylinder skirts are too large to fit the cases. You'd have to pull your engine apart to find out what you have, because they vary. That's not a real common issue, but it happens.
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