1953? Or 1966 modified twin spark plug twin carb hummer

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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby bobscogin » Mon Jun 24, 2019 10:18 pm

Bertstert973 wrote:I even been looking at keeping it 100% Harley and put a sprint motor 250 or 250 into it. Just not sure how well it would all line up. Any one have the specs of the motor size and the frame sizes are for this model?

I can't imagine in my wildest dreams trying to use a Sprint motor. Modifications on so many levels would be required that there wouldn't be much left of what you started with. Mutt can get power out of the little two strokes if you want to keep an original type engine.

Bob
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby Bertstert973 » Tue Jun 25, 2019 10:05 am

Wow that’s pretty impressive. For a 125! Do u happen to have a link for that bike or know how I can find it? And I appreciate all your help mutt and others. I have other pictures I’ll send along with it running.
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby billc » Tue Jun 25, 2019 10:41 am

"You can always do some extreme porting and get a good expansion chamber designed around your porting. There's a 50 125 that turned a 14.5 sec standing start 1/4 mile in 1950 on the Hummer club website"

hey mutt, can you post a link to this ?
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby Mutt » Tue Jun 25, 2019 10:42 am

You'll have to get with Brent, the link on the website is dead ?

https://www.harleyhummerclub.org/member ... index.html

in the meantime, here is a link to my own hot rod.

https://www.youtube.com/watch?v=qH5-soh57bU

and a pic of the latest pipe on it.
webco 36a.jpg
webco 36a.jpg (119.13 KiB) Viewed 362 times


Alan of HarleyHummer.com has a race bike, maybe he can clue ya in , to all the mods he did on his own motor.
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby stanley » Tue Jun 25, 2019 3:55 pm

Hi this was one of my bikes I built to race at davenport. It has a pucket head he made racing parts for harley hummers. The cylinder has been ported a lot and it has a reed box I made to mount the two mikuni carbs. It has all the racing gears in it and a seven spring clutch the ex. is off a dirt bike made to fit. I raced it at davenport only one time because they thought I did to much work on it that it would't be fair to others that can't do this kind of work. The bike would go just over 85 mph on the street and it was a joy to ride. Thanks for the pict. I miss that bike but I can build a new one. yours truley Stan Waite PS I now live in fla. where its summer all year.
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby Brent » Mon Jul 01, 2019 5:47 pm

Mutt,
Thanks for pointing that dead link out. I checked into it and it was linked to an article that was posted for only a short time and is no longer available. I thought it was going to be a continuing link as 'nothing ever goes away on the internet' so I didn't copy/paste the info. Hind sight is 20/20 so YES, I should have. Ooops.
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Re: 1953? Or 1966 modified twin spark plug twin carb hummer

Postby Brent » Tue Jul 02, 2019 6:20 pm

Stan, just out of curiosity: did that bike have the race gears I sold you at Harmony that one year?
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