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10-06-2009, 03:27 PM
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#1 (permalink)
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Junior Member
Join Date: Aug 2009
Location: Indiana
Posts: 10
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Puzzled????
I had a slight seepage at the base of the rear jug. I bought gaskets from the local MOCO dealer. Pulled it down and checked everything to make sure it was all straight and square. All checked good so I cleaned everything up and began to reassemble, I found the ID of the jug base gasket needed trimmed to fit over the index lip of the jug, no biggie, then I set the first head gasket in place and it was too small for the bore. I went back to MOCO with an old gasket and they swapped them out for ones like I had. They new ones were SE packaged. I looked and the crankcase dose have the proper vin on it. I checked the bore and stroke 3.875" X 4.5". I don't think this is an 80" evo no more!
I have found out that the original owner, now passed away, was a factory sponsored HD pro stock rider for many years. I got the bike from the second owner. I went back to mi indy shop yesterday and picked up a super e carb, and some ign parts. Put it all on got it tuned and can I say WOW what a difference!
Power, throttle response and even sounds different!
How does it run you ask? Well I can lift the front wheel in second!!!
I didn't think you could go this big in a stock case? What do I acutally have here? One thing I failed to mention the pistons are not flat tops they have a dome.
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10-06-2009, 04:51 PM
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#2 (permalink)
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Mentally unstable.
Join Date: Jun 2008
Location: Pennsyltucky
Posts: 6,627
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CID = NOC x 0.7854 x Bore2 (squared) x stroke.
NOC = 2
BORE = 4.5 inch
STROKE = 3.875 inch
Cubic Inch Displacement (CID) = 123.2587125 inch^3
A 2019 CC engine.....
Something doesn't sound right.....
__________________
HERD meber #10
DISCLAIMER: Any information, advice or child raising tips I give on this forum should be taken with a grain of salt, 8 hours sleep and at least 6 beers.
Following my instructions will likely lead to death, mental retardation and/or bodily injury, consistant with eating lead-based paint chips, and by doing so, will release me, my family and my dog from any legal action(s) for listening to anything I recommended. 
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10-06-2009, 04:57 PM
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#3 (permalink)
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nitro freak
Join Date: Jul 2009
Location: bloomington,in.
Posts: 112
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evo cases will take 3.812 bore and a 5.25 stroke(120"),sounds like youve got 3.812 bore & 4.5 stroke(103")
kirby
vee twin racing
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10-06-2009, 05:01 PM
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#4 (permalink)
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Mentally unstable.
Join Date: Jun 2008
Location: Pennsyltucky
Posts: 6,627
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Quote:
Originally Posted by prodrag1320
evo cases will take 3.812 bore and a 5.25 stroke(120"),sounds like youve got 3.812 bore & 4.5 stroke(103")kirby
vee twin racing
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Comes out to 102.716 CID
__________________
HERD meber #10
DISCLAIMER: Any information, advice or child raising tips I give on this forum should be taken with a grain of salt, 8 hours sleep and at least 6 beers.
Following my instructions will likely lead to death, mental retardation and/or bodily injury, consistant with eating lead-based paint chips, and by doing so, will release me, my family and my dog from any legal action(s) for listening to anything I recommended.
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10-06-2009, 08:27 PM
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#5 (permalink)
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Junior Member
Join Date: Aug 2009
Location: Indiana
Posts: 10
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Your most likley correct on the 3.812" bore. I didn't have my bore gauge at home I was useing a tape measure!! Eyeballing it it was 3 7/8" which is 3.875" thats were I was heading.
The guy I got the scoot from said "it had some aftermarket crap, on it and he put it back stock".
It is a way different animal with the carb and ign upgrades.
Makes me wish it were the end of April instead of first of Oct!!
Don't know what cam is in there, what would you guys suggest?
Heck I've already woke it up might as well make it angry!!
Looks like I am going to have all winter to tinker!
Don
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