The Ascot 500 Forum > Welcome
Hi ! VT500 all over the world !
J6G1Z:
11.5:1 would probably work with our 92 octane pump gas & should make the bike a bit crisper.
Hmmm...
J.
scottly:
Just remember that 10% ethanol runs about 4% leaner, so that also figures into jetting. ;)
Dibingo:
--- Quote from: scottly on July 28, 2014, 10:09:45 pm ---Removing .6mm from a 71mm bore cylinder would reduce the combustion chamber volume by 2.374cc. This would increase the stock compression ratio from 10.5:1 to maybe 11.5:1?
--- End quote ---
That's really it! ;)
--- Quote ---Just remember that 10% ethanol runs about 4% leaner, so that also figures into jetting.
--- End quote ---
I think it could works with your ethanol too !
J6G1Z:
I'm thinking that increasing the compression by one full point, installing a couple of performance camshafts from MegaCycle Cams: http://www.megacyclecams.com/catalog/catalog.pdf (Check out page #32 for the heading on the HONDA NT-650 HAWK (1988—1991) 500 ASCOT twin (1983—1984)) and some light porting work would really wake up a VT. Not that a VT is any slouch for a 500cc bike, but I always want more. I don't suspect there is much than can be done with the carbs other than jetting. I don't suppose that there are a pair of larger venturi canted carbs that will fit between the cylinders.
I wonder how much horsepower increase one would experience.
J.
J6G1Z:
Just for the heck of it, I called MegaCycle Camshafts to see what type of pricing is involved with an Ascot camshaft swap.
You're looking at sending your stock camshafts in along with the payment (they do not accept credit cards or pay-pal yet, but they will accept your personal check, money orders, etc.) it takes approximately 7 to 10 business days for them to hardface & grind the new profile on your camshafts. You also need to purchase their valve spring upgrade kit.
Camshaft work is: $394
Valve Spring kit is: $369
Prior to placing an order. You need to contact them to discuss your bike, modifications, riding style, etc, to make sure that the new camshafts satisfy your goals. It would be real easy to buy yourself too much camshaft & not enjoy the new powerband.
Good luck
J.
PS. MegaCycle can also provide some Wiseco replacement pistons for the VT.
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