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Post by hypojam on Feb 16, 2006 2:37:17 GMT
Cool Although it is quite odd that you do all your moped work inside
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Post by chcknugget on Feb 16, 2006 5:03:05 GMT
Cool Although it is quite odd that you do all your moped work inside ScootintheUSA can testify as to why I do not do any work outside. And I don't have my own garage as of yet
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Post by r08813 on Feb 16, 2006 12:50:29 GMT
I thought that it was best to port match the inlet manifold and head, but a small step between the exhaust and head was a good idea, something about stopping backflow. Have a look at www.sa-motorsports.com/diyport.shtm for details.
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Post by Macrofeet on Feb 16, 2006 13:30:11 GMT
nice pics and effort, hope its all worth it
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Post by Macrofeet on Feb 16, 2006 14:16:40 GMT
Quote: "Cool
Although it is quite odd that you do all your moped work inside"
i was thinking that, your place looks free of mud carbon oil dirt and petrol you must be a way carfull person if i did mine inside the fuel filter or valve would prob snap off knowing my luck
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Post by BillyGreen1973 on Feb 16, 2006 16:06:10 GMT
There looks to be quite a lot to come out of the exhaust port. What does the port measure now? It almost looks like a resricting ring you normally find in the exhaust pipe it's self!
That much of a difference should make a huge improvement. Keep us posted.
Oh, by the way, Would you be prepared to sell one of your spare heads if I kill mine #hammer#
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ted
Regular
Posts: 39
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Post by ted on Feb 16, 2006 17:02:33 GMT
A workshop with a bed in it? Sounds like heaven! Good luck with your project+the pics are great. One picture saves a thousand words, etc.
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Post by chcknugget on Feb 16, 2006 19:27:12 GMT
There looks to be quite a lot to come out of the exhaust port. What does the port measure now? It almost looks like a resricting ring you normally find in the exhaust pipe it's self! That much of a difference should make a huge improvement. Keep us posted. Oh, by the way, Would you be prepared to sell one of your spare heads if I kill mine #hammer# The inside of my header measures about 19.6mm, but I dremeled the exhaust hole in the head out to about 22.5mm. It looks like you can go to a max of 24mm (if keeping stock gasket). I plan on installing a pipe that is 22mm inner diameter as soon as I can find someone to help me! Billygreen, you're using the stock 50cc head on your 80cc, right? I don't think it would be that hard to find a replacement, but I can help you if you need it!
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Post by chcknugget on Feb 16, 2006 19:28:30 GMT
Cool Although it is quite odd that you do all your moped work inside how it is outside...
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Post by ally1756 on Feb 16, 2006 22:09:09 GMT
lol now i understand!
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Post by chcknugget on Feb 18, 2006 19:14:35 GMT
Well, I thought I'd update you guys... I tried it out yesterday, and it didn't work so well. It feels like the valves are misadjusted, I should've double checked them when I put it together. It starts and idles fine, but it doesn't really accelerate past that.
I would work on it, but now it's outside and the weather channel says it's -7degF windchill outside which is -22degCelcius. No thanks!
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Post by chcknugget on Feb 22, 2006 22:59:58 GMT
OKOK! Here's the bottom line:
-1 removed cylinder base gasket/ replaced with liquid gasket to boost compression by 1mm -Upjet from a #75 to an #85 on my keihin 19mm -Radical porting on exhaust increasing diameter from 16-22mm, and manifold matching on intake
An even faster scoot! I would say speed increased by 3mph, but torque has been greatly improved! This thing is quick from the stop!
My scoot was going 40 into the light wind and well over 40 (maybe 45?) with it. Very cool!
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Post by ally1756 on Mar 1, 2006 21:37:49 GMT
great! id do it to mine but i cant be arsed lol ally
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Post by hypojam on Mar 1, 2006 22:49:07 GMT
What tool did you use to grind the port out?
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Post by chcknugget on Mar 2, 2006 1:10:21 GMT
I used a dremel tool with multiple bits. I bought this huge variety pack of bits and it had grinding wheels and polishing brushes and all in it.
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