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150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum

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  #1  
Old 02-21-2014, 07:56 AM
wildbob wildbob is offline
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Default so close and yet so far..

Well,
My buggy is put but together except for the exhaust.. New head's exhaust port is clocked differently so it looks like I'm going to have to cut the flange off my pipe and re-weld.
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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Old 02-21-2014, 11:28 PM
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2SlickNick 2SlickNick is offline
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That sucks. Hope it works out. You should take a picture and that way others considering the 4 valves mught have an idea of problems and solutions.
My larger head caused my exhaust pipe to be several mm out alignment. I was able to persuade it on if you know what I mean.
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Old 02-22-2014, 10:17 AM
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Johnny 5 Johnny 5 is offline
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Let us know how that 4v head is compared to the stock one. I will assume it will have great high rpm power over stock.
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Old 02-24-2014, 08:21 AM
wildbob wildbob is offline
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I will, waiting on my buddy with the welder (and experience) to help me out with the exhaust. I'll have to break it in, but, I'll post any gains..
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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  #5  
Old 03-12-2014, 08:43 AM
wildbob wildbob is offline
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So, I should be getting the exhaust back today, capping off my engine build. I removed the vacuum petcock from my gas tank installed a gravity feed, and capped off the vacuum nipple on the intake, filled up fluids, threw the battery in, and cranked the motor (with the gas off) to make sure there were no evil metal on metal noises, and all seems well so far. I've got the dash apart for a custom dash project that I'll document in a separate post, but it's looking like I'll be firing up the buggy today for the first time in months. As a mechanical newbie, I found the gy6 really easy to work on, and I don't have any fear of having to "split the cases" anymore.
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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Old 03-12-2014, 10:21 AM
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2SlickNick 2SlickNick is offline
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Good.
I hope for you benefit you did do some timing and speed runs.
I wish I did. I can feel more torque, but don't have numbers to compare.
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Old 03-12-2014, 12:02 PM
wildbob wildbob is offline
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Yeah, I don't have any hard numbers from before, just looking for a bit more grunt. I'm actually looking more forward to getting the suspension re-done that anything else, but I'm hoping that there is a definite seat of the pants increase in performance. For the most part the GY6 has been fine for what I do. I'm not competing with quads or dirt bikes, just blasting around on trails with some nice long stretches of unimproved roads.
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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