Comments on: Harley Davidson 4 Valve Big Twin Sportbike

By: roy

roy — Wed, 17 Mar 2010 22:51:47 +0000

ive been looking for a bike like this for some time. or with a tripple snowmobile engine fitted in a sportbike frame.

when i saw the weight,,it was on,,,,
my zook dl1000 weighs about 440lbs,,put a MERCH 125/125 in my bike,,youd fly. or the arct-cat 1000cc trip fitted to my frame.

By: nick calvert

nick calvert — Wed, 03 Feb 2010 11:56:47 +0000

hi, i have some imformation on this bike. it was built by two brothers ay ivybridge at a company called welbro. sadly one of them died and the last time i went over there there was a lovely blade in the jig with an amazing frame being wrapped around it. the bike was featured in back street heroes magazine years ago as well. any more info email me and i will try and find the mag.. they also built an amazing fj1200 about 20 years ago for a chap named crow. those lovely big beam frame rails being one of there many styles.

By: Adrian

Adrian — Fri, 06 Nov 2009 19:05:22 +0000

setting the pace for lightweight & big bore thumpers of recent. the duc M1100 is 373 lbs (wet i think) in 2009. the buell 1125 is around 390 dry. i wonder if the M1100 could strip off 50-60 lbs for a track. awesomeness. and probably an inspiration for mr. buell. what a foolish move to remove the very good buell line. one of the best realizations of american engineering. considering the amount of bailout money given to those losers at gm, ford and other useless engineers. cripes. perhaps the chinese will bailout buell. i wouldnt be suprised.

By: John

John — Tue, 15 Sep 2009 07:20:29 +0000

RealityCzech 10.11.08 at 12:28 pm
A simple “Duh?” would suffice. What’s the point
Yea exactly,what is your point,show us what you’ve built lately.

By: nobody

nobody — Fri, 31 Jul 2009 22:11:42 +0000

Dan R,

Basic H-D engine recognition stuff worth learning:

You might want to compare Sportster cam covers to BT cam covers. How many Sportsters have 2 lifters in the same lifter block – and at different angles from each other rather than parallel like Sportster pushrods? How many Sportsters have bolt on primary drives & transmissions (Hint: none)? Why is the oil pump behind the cam (BT style) rather than underneath them (Sportster style) ? Etc..

And NO, BT pushrods don’t cross each other.