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Post by buford1488 on Jun 14, 2014 4:29:49 GMT -5
yea thats cool..but i want you to remember something here'' that head looks like a hoco head not the performance big valve hand ported headhttp://www.scrappydogscooters.com/images/624f74f33ed5916bd1ee5b81cd6582a5.jpg. dont know why my pic is on there and they are sending some thing that is not what you order'ed. just remember if it aint hand ported like the one they are showing you are not getting the full potional out of it....just thought you should know that that head just because it has bigger valves and bigger intake dont make it a performance head..........when it's hand ported then it is...jmo. now i know some one will chime in here but dont care..if he orded a real performance head that is what he should GET!!...thanks injoy and be safe.............buford
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Post by buford1488 on Aug 20, 2014 5:11:24 GMT -5
my new shop maybe up and running in a few week's.........fingers cross................be safe.....buford
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Post by carasdad on Aug 20, 2014 16:00:10 GMT -5
I wouldn't worry about the high compression cause with a 51.5mm BBK your crank bearings will most likely be shot at about 1,000 miles. At my shop I have yet to see one come in that didn't. The 50mm..51.5mm and 52mm pistons weigh TWICE what the stock 39mm does..and the crankshaft counterweights are not balanced for that extra weight. Reason why folks with those super huge BBK's feel more vibration from their engine. Plain and simple the rotating weights of the crankshaft are not heavy enough to offset the reciprocating (up and down) weight of the piston. This causes the engine to rotate as unbalanced as a cheap $20.00 Ceiling Fan does..  Enjoy the very few miles you will get out of the engine..hope it is fun while it lasts...  |
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Post by shalomdawg on Aug 20, 2014 19:54:55 GMT -5
howdy and like an earlier post mentions, it is worth the try to jump it with a car battery and see whether you are losing that much voltage somewhere or the load from the start attempt is so high that it won't crank. anyway it can't hurt to try.
lotsa miles and smiles to ya
ken
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Post by carasdad on Aug 20, 2014 20:24:39 GMT -5
Let's use a lil common sense...or at least try. Ok if an engines compression is so high you can't kick start or electric start it..SOMETHING is wrong!! So why would you want to force something to turn over when obviously there is a problem. It could be...hmmm...aha! The compression is TOO HIGH!! I am watching this post closely..cause in 2 of the other forums I belong to...there were several people with compression so high they could not start the engine. But they were finally successful jumping them from car and lawn tractor batteries. Successful to the point that they snapped or bent the connecting rod anyway..once the engine fired up. Why would you want to force something that obviously has a problem that needs to be fixed first? If one of the windows in your house was hard to open...would you use a sledge hammer to force it open..or would you figure out why it is so hard to open?  You NEED to bring the compression down...bottom line. But then again...what do I know..I have only had a Scooter parts/repair shop for 9 years and work on them daily. I also specialize in high performance builds for customers.  Get a nice sturdy box for your engine parts...yer gonna need one when you grenade the engine. Oh and when you do...please post pics. Thanks..  |
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Post by buford1488 on Aug 21, 2014 7:53:26 GMT -5
yes there is way's to bring the compression down to a safe number..plus there are heavy duty starter's to crank it. plus after a break in it get's better..i done hundreds if not a thousand ported big valve heads and had maybe two or three complaints...plus my heads are use'ly for the serious builders....be safe......buford
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Post by carasdad on Aug 21, 2014 8:15:02 GMT -5
yes there is way's to bring the compression down to a safe number..plus there are heavy duty starter's to crank it. plus after a break in it get's better..i done hundreds if not a thousand ported big valve heads and had maybe two or three complaints...plus my heads are use'ly for the serious builders....be safe......buford buford...exactly Sir! There are ways to bring compression down..ie on one GY6 150 BBK I used 2 extra base gaskets. Worked well. Also I hear rave reviews on your head work which will do the same. While not only decreasing compression..your heads increase flow!! So ya end up getting a 2 for 1 deal right there..  |
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Post by shalomdawg on Aug 21, 2014 17:16:52 GMT -5
howdy, i guess i shouldn't feel bad about being taken to task from professionals. when i suggested jumping with a car it was only to confirm whether there was deterioration in the wiring which was lowering the voltage due to too much amperage draw for the existing wiring. anyway, you professionals know what i'm suggesting like some change in the wiring due to disconnecting and re-connecting at overhaul.
lotsa miles and smiles to ya
ken
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Post by carasdad on Aug 21, 2014 17:26:34 GMT -5
howdy, i guess i shouldn't feel bad about being taken to task from professionals. when i suggested jumping with a car it was only to confirm whether there was deterioration in the wiring which was lowering the voltage due to too much amperage draw for the existing wiring. anyway, you professionals know what i'm suggesting like some change in the wiring due to disconnecting and re-connecting at overhaul. lotsa miles and smiles to ya ken Ken...it's all good. My point was not about jumping from a car..I do that often when I do a roadside repair for folks that also have a bad battery they refuse to replace. My point Sir was that if compression was so high it needed a 600cca battery from a car just turn turn it over..well compression is WAY to high. Jumping a Scoot from a good running Scoot with normal compression is no issue at all. But when compression is so high that it is needed...well..that is an issue..and the issue I meant when folks jump from a 300cca lawn tractor battery or 600cca or better car battery. Glenn |
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Post by buford1488 on Aug 22, 2014 9:10:07 GMT -5
thanks carasdad...........
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