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Post by sailracer on Aug 14, 2013 15:21:12 GMT -5
I've given up trying to make the hoca piston work in a skrappydog BBK. Their pistons have to be dished for a reason. I just couldn't make it run right. I will either get the complete hoca BBK, or another scrappydog one. I think with the a9 cam, it just made too much compression.even with 2 base gaskets. tried an 18mm cqrb, a 20mm carb.an assortment of jets. airbox-no airbox airbox with 5/4/3/2&1 holes. the only thing left would be exhaust.Revs nice on the stand, no good on the road  |
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Post by millsc on Aug 14, 2013 15:26:47 GMT -5
Like i have said before not all pistons work with all cylinders, the hoca piston does not work with an ebay cylinder either, i tried it.
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Post by millsc on Aug 14, 2013 15:28:23 GMT -5
I suggest the airsal 50mm its an awesome bbk
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The PartsForScooters Guy
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Post by fugaziiv on Aug 14, 2013 15:30:03 GMT -5
Hmm, I haven't had reports of many people try to use the Hoca pistons in someone else's BBK... Actually, with too much compression the performance pistons tend to come apart on the QMB engines, so it's probably good that you called this project when you did. Do you know what company makes the Scrappy kit?
Matt
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Post by sailracer on Aug 14, 2013 15:55:11 GMT -5
[replyingto=fugaziiv]fugaziiv[/replyingto]nothing on the cylinder, but the head says JINHUA. they modify it .I got the hoca,1 because i wanted to try it anyway 2 I damaged the 2nd groove on the piston by a soft seize and they dont sell single pistons,to be honest, I really didn't like the 20mm carb either.(no guide under the diaphragm spring, and needle not adjustable)
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Post by sailracer on Aug 14, 2013 15:56:05 GMT -5
I suggest the airsal 50mm its an awesome bbk who carries them? |
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Post by carasdad on Aug 14, 2013 15:56:35 GMT -5
Only domed 4T piston I have ever seen is the Airsal kit. Those 50mm kits are all I put in customer Scoots and the output is better than any 52mm I have installed. PLUS Airsal quality at a SUPER cheap price. Here is a link to the Airal kit. It was designed for the stock rod and head even!  www.spi-parts.com/gy6-airsal-81cc-big-bore-cylinder-kit-02350150.htmlLike Matt said and his advice is always solid...based facts from not only a shop owner..but rider and scoot mechanic himself..so as he said..better quit while you are ahead...  Buy kit as all one piece..vice piecing one together.  Glenn |
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Post by millsc on Aug 14, 2013 15:58:34 GMT -5
Spi sold them all I bought six of them, sadly I used them all on jobs
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Post by carasdad on Aug 14, 2013 16:00:27 GMT -5
Spi sold them all I bought six of them, sadly I used them all on jobs Talked to Louie today...he told me he was getting more in because they go like Hotcakes... |
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Post by millsc on Aug 14, 2013 16:03:48 GMT -5
Ok cool ill buy ten or so this time  |
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Post by buford1488 on Aug 14, 2013 16:26:04 GMT -5
was that with the big valve head?................buford
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Post by sailracer on Aug 14, 2013 16:26:11 GMT -5
Thanks guys Oh well If I didn't try, I'd never know.I love a good experiment anyway . It's not all bad, I learned something ;D That's always a good thing! |
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Post by sailracer on Aug 14, 2013 16:27:25 GMT -5
[replyingto=buford1488]buford1488[/replyingto]no, I beleive it was the 47mm with the releif cut in it
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Post by buford1488 on Aug 14, 2013 16:28:13 GMT -5
ok thanks sailracer....
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jet
