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04-27-2016, 06:21 AM | #1 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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Adjust your valves!
This site is filled with thread after thread of people who describe valves being too tight.
Valves are self-tightening. They require regular inspection every 800 miles or so. Gy6 valves are supposed to be set to .004" for the intake, and .005" for the exhaust. This valve to rocker arm gap is not a variable setting, no bike requires " less" gap. Valves must be adjusted ONLY WHEN ENGINE IS DEAD-COLD. If your bike starts hard, cuts out after becoming warm, or won't start after being shut down and is still at operational temp, it is 99% likely you have over-tight valves.
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2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats. |
04-27-2016, 12:41 PM | #2 | |
Join Date: Dec 2014
Posts: 738
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Quote:
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04-29-2016, 05:30 PM | #3 | |
Join Date: Dec 2013
Location: Western New York
Posts: 454
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Quote:
My scooter's valves have held their adjustment very well for the last 6800 miles.....last adjusted them in June 2013, at 2502 miles. Now at 9294 miles, and gaps are still .004" and .005". I do check them annually as stated above, but have not needed to adjust them. |
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05-02-2016, 12:37 PM | #4 |
Join Date: Jun 2012
Location: Charleston, SC
Posts: 23
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Here's a how to video that we made:
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07-07-2017, 12:16 PM | #5 |
Join Date: Jun 2015
Location: Dandridge,tn 37725
Posts: 57
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On my 3 Ice Bear trikes 1 7,000 another 5,000 another 2,000 mile never been checked took a compression test new and ever now and then no change no reason to. They been running great for the the last to 2 years if not broken don't fit it.
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07-08-2017, 09:41 AM | #6 |
Join Date: May 2017
Location: Norfolk, VA
Posts: 607
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Just because nothing performance wise has not changed does not mean to ignore them. As you ride the scoot on a regular basis you will not notice the slow changes in performance. I rode with another Buddy 125 (when I still had my Buddy 125) and kept leaving him for dead. To him it seemed normal, to me it was weak in power. So, we checked the valves. Sure enough, the exhaust was silly tight and the intake was out of spec. Everyone on the Spyder forum told me to not bother with the valves at 16,000 miles but I checked them anyways. They were fine, just took FOREVER to get to them! So I see your point with the Ice Bear trikes.
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07-10-2017, 09:01 PM | #7 |
Join Date: Jun 2015
Location: Dandridge,tn 37725
Posts: 57
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Remember compression will change if valve lash changes. It sort of like you heart and blood pressure reading. If you test compression which is simple keep a record it will tell you the health of the over all of whole engine not just valves but the oil rings and compression rings and so forth. Nothing like the whole picture not a snipped.
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