Fred Head combustion chamber size guide for motorized bicycles
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Hi folks. I wanted to make this video to help people select the head which will give optimal performance. Many factors affect which size combustion chamber is the best. The size of the intake and exhaust systems tend to be the main deciding factor. Although rider weight, gearing and type of driving/track will also have an influence on proper selection. Go to www.crmachine.com to purchase heads and other engine parts.
Comments
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the octane you are talking about whe talkin about 100 is that the RON or MON octane
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Why did you not just offer 1 head and a range of head gasket spacers ??
What is the HP of an 80 CC engine "Full House" ?? and do you have a break-down of the HP of each hop-up part ?? -
I'll clean your shop for a new cylinder head
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where can we order your parts
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when are you going to offer a cylinder thats already ported wit the piston, ring, copper gasket and bearing????? it sure would help us without a machine shop to have the bike bling bling that your bikes have
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Just purchased a 6.0cc fred head, can't wait!!
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What is the miniature spark plug?
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Hi fred i wanted to ask you, have you used thos aluminum frames with a gas tank built in many online sellers offer? Do you think it is safe for speeds over 35 mph? I want to build a high performance bike but i havent quite found a frame i feel to be strong and safe enough.
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Thanks
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Which one is the most robust on pump gas? I am talking about a daily driver.
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What cc is oe approximately? what do you recommend? I bored/ground out the intake neck and exhaust pipe and their gaskets to match. stock head slant and non-slant. 80cc (67cc) skyhawk grubee. Stock carb. Stock gutted pipe. Nology coil & Jaguar cdi conventional neg ground. Wish to use pump 92/93 octane. Rider weight 182lbs. Tour gear 20-35lbs. Bike 47lbs. Extended (meaning hrs) of 3/4-7/8 throttle open use. Frequent bursts of wot. 36 tooth, 35-622 (700c). ele 300-1600ft? Air temp 22-90 deg F. Humidity (I know it matters a little but who cares). Am I forgetting anything?
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I'm in Colombia, I would buy one, where I can buy it?
11m 55sLenght
56Rating