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Post by ramblinman on Feb 4, 2014 9:38:06 GMT -5
i've been sitting on a few parts for my scooter for a while. one major upgrade i would like to accomplish is a new big valve head. well, i bought a cheap one on ebay and figured if it wasn't perfect that i could do a little work with the dremel and also lap the valves myself... boy was i mistaken.
just removing the valves is proving to be too difficult without special tools. this kid makes it look easy:
i did smooth out a few casting flaws but other than that i'm thinking of just putting it on as is. it isn't too bad and i can't imagine it being worse than my stock head with 16,000km.
going to work on it today. hopefully it goes smoothly. next time i'm buying a professionally ported head.
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Post by wilds on Feb 4, 2014 10:09:21 GMT -5
I made my own special tool for removing the valves:  easy...  |
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Post by ramblinman on Feb 4, 2014 10:31:19 GMT -5
pulled the valve cover off and smelled gas. that can't be good, lol.
i wouldn't even know where to begin to make my own tool. i can't even picture how to use yours. i've seen one tool on youtube that was supposedly designed for valve removal. looked like a bottle cork remover but he still struggled with it compared to the vid above.
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Post by ramblinman on Feb 4, 2014 11:57:51 GMT -5
the springs are so weak on the stock head that i am certain i could remove the valves with little effort. looking with a bright light it appears the valves are sealed so what would cause gas in the valve cover? weak springs?
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Post by wilds on Feb 5, 2014 2:25:12 GMT -5
I'll post a picture of how to use it later today when I get home.
It's easier to remove the valves than putting them back without a tool of some sort.
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Sophomore Rider
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Post by buford1488 on Feb 5, 2014 7:46:23 GMT -5
hey ramblinman. just want to chime in here and give ya a lil heads up.has every body know i do porting and big valves on these heads on a regular basis.the dremel thing bad idea it will take you for ever unless you plan on just cleaning up the beginning of the ports. you cant get in for enough to do it right. i use special air tools. and carbide cutters.if you just make a bigger hole and do nothing to the valves like bigger you are wasting your time and money.but who am i to say. just trying to save you some time and money.it takes many years to learn the technique of porting. and yea i know about the ebay special's.i get alot of people bringing me there leaking heads that they get for lil money..if you have a old head i would practice first.....good luck. if i can be any help just ask........buford
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Post by wilds on Feb 5, 2014 12:21:28 GMT -5
This is how I use my home made valve clamp:   |
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