52mm Big Bore Kit

seaquell
Scoot Junior

Posts: 12

52mm Big Bore Kit Apr 28, 2012 13:16:39 GMT -5

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Post by seaquell on Apr 28, 2012 13:16:39 GMT -5

Hi, all. Just bought 3 scoots for the family to get around the beach coast in Michigan and North Carolina. 2 are new Tao Tao,I bought my peace sport 50cc used 1,400 km. I am a avid machinist/tool die/mechanic. So I need to hop it UP. I got the Scrappy dog 52mm BBK And I will probb. relieve the stock head around a 52mm Dia. a bit to keep the compression down. Other than that its getting a uni pod air filter and polygon rollers, maybe cut the muffler can and gut. Should I re jet the stock carb or go with a keihen stock size or scrappy dog 23mm carb? Any ideas :help: Is a perf. cam worth it. I dont think I need the big valve head, its just for mild use.
Also all the 52mm bbk seem to have a fully machined piston top not just cast with the 2 cut valve reliefs like 50mm and under, Is it a better piston?

Deleted
Deleted Member

Posts: 0

52mm Big Bore Kit Apr 28, 2012 14:24:50 GMT -5

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Post by Deleted on Apr 28, 2012 14:24:50 GMT -5

The stock carbs are junk but if you have tools get it jetted up asap. 23mm is kind of big IMO...18mm is plenty enough. A touring cam will give more low end...a race cam will give more top end. www.racingplanetusa.com/advanced_search_result.php?sessID=8daad231bd2b7945f800b06bc850e5ad&products_keywords=naraku+cam&x=0&y=0

You should use the big valve head along with the cam....they compliment each other.
The pistons are all cast never seen a forged and cut one in any of the kits...costs too much.

Last Edit: Apr 28, 2012 15:57:27 GMT -5 by Deleted

seaquell Scoot Junior Posts: 12	52mm Big Bore Kit Apr 28, 2012 18:06:37 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by seaquell on Apr 28, 2012 18:06:37 GMT -5 Thx for the info, I got a Keihein carb on the way. The one you recommended from the guy on Ebay. do I need to change the idle jet and what main jet is close for my set up?