Scooter Doc
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Post by Kaveman on Mar 14, 2011 22:10:57 GMT -6
Does anyone have a gy6 bigbore case boring tool one could borrow or rent ? Only needed for one crankcase set. Any help would be much appreciated.
Bill C.
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Post by jhbietz on Mar 15, 2011 0:01:01 GMT -6
I used a air grinder with a drum sanding attachment on a 50cc.If the 150cc are the same the cylinder is located on the dowel pins not the cylinder opening. This means you just have to open uip the crank case enouf to fit the cylinder. It dose not
have to be precise. Just remember to clean everything very carefully! You don't want mettle shavings in your oil.
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Scooter Doc
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Post by sprocket on Mar 15, 2011 10:56:41 GMT -6
Get it machined property... I have seen guys grind the cases and they wonder why their main bearings fail in 2000 miles... grinding grit in the engine....
No matter how careful you are, you are going to leave grit in the engine and air blasting can't remove it.
Don't cut corners, take it to a machine shop or buy a case that has been pre-machined...
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Post by jhbietz on Mar 15, 2011 12:42:27 GMT -6
It can be done. You have to split the case, remove the crankshaft, put the case back together, grind it out, split case and clean, and then reassemble.
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Scooter Doc
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Post by sprocket on Mar 15, 2011 16:36:55 GMT -6
Or get it machined.. then you know it is done right... most places do it for $80. Check on the internet
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Scooter Doc
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Post by Kaveman on Mar 16, 2011 18:45:13 GMT -6
Property manager forced me to get scooter running immediatley or face getting evicted for having scooter apart in the parking lot. There simply isn't any time to get case machined now. I'll have to stick with an almost stock engine with an a9 cam for a couple more months . The plan now is to buy a machined out case and build a new bigger engine to my specs as funds permit. It has been a good learning expierence . Now I understand the engine's mechanics and what's needed to build a new engine. I have the cylinder and new piston to start the project with atleast ! Bill C.  |
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Post by jhbietz on Mar 16, 2011 18:57:18 GMT -6
That's a good reason to buy a machined case! Otherwise it come down to what you have more of. Time or money.
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Clinician
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Post by wizardaeon on Mar 20, 2011 17:50:44 GMT -6
unless you have a gas leak, take the scooter inside and stick it in the living room and cover it up unless you have some kind of special agreement on your lease the landlord cant barge into your house/apartment to see if its there...
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Scooter Doc
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Post by Kaveman on Mar 20, 2011 19:44:38 GMT -6
If I had room in my small studio apartment I would have.
Bill C.
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Post by jhbietz on Mar 20, 2011 21:25:12 GMT -6
My brother overhauled an old Honda in his dorm room at ASU. Man it was tight in there!
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