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Old 02-17-2015, 08:00 PM   #1
Banzaibob OP
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Diesel Motorcycles: They really are kinda cool.

This is the Red Devil. It started out as a 1970 Honda CB350 and a Yanmar L100. Primary is an 18 pitch 2" industrial belt and pulley. The clutch is wet/dry, kinda. Installed a 17 amp Sportster alternator under the flywheel, plenty of electricity for anything. Suffice it to say; So far on surface streets it does a solid 60 mph and gets 175mpg. It is loud, smelly, slow and totally cool. Surprisingly it vibrates very little. Here is the build article I wrote for dieselbike.net. http://www.dieselbike.net/Red_Devil/Red_Devil.htm
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Old 02-17-2015, 08:10 PM   #2
OldDog
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Thanks for posting that, I've always had a penchant for diesel powered "stuff". I'm enjoying the read and thinking....what could I use hmmmmm
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Old 02-17-2015, 11:35 PM   #3
Te Hopo
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Thats awesome, any more pics you could share with us as thats a great looking bike.
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Old 02-18-2015, 05:55 AM   #4
Frey
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Quote:
Originally Posted by Banzaibob View Post
A lot of people try to build the perfect post-apocalyptic motorcycle. Some have a lot of pointy things sticking out of them. That’s good.


Very cool! If we go post apocalyptic I think with your building skills you will do great.
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Old 02-18-2015, 02:49 PM   #5
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It may take a while to get more pics...it is not allowing me to upload because of size issues.
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Old 02-18-2015, 02:58 PM   #6
jfman
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I like it

top speed?
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Old 02-18-2015, 06:07 PM   #7
bk brkr baker
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Spotted at the Barber Vintage Fest in '09. Twin cylinder Yanmar diesel driving a hydraulic pump and driving both wheels . Forward and reverse.
The square black tubing is aluminum , so , it's not as heavy as it first appears .
I talked to the builder who said he'd had it up to 60 mph , forward. He also said if he did it again he'd lose the cruiser stance and aim more for a upright ,dirt bike stance for better control off road.
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Old 02-19-2015, 07:38 AM   #8
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The Red Devil will do about 60mph tops. It pulls modest hills at 35-40mph. I tried to put a RHB31 turbocharger on it. It is simply too small an engine and has too low of a redline to work effectively. If I could make it rev to 6000rpm I might see some boost but the valves would float well before that.

I am looking for another diesel engine to build a bike around. I figure that a typically 25hp engine on middleweight chassis could result in a bike that could reliably cruise the interstate at 80mph tops and still get over 60mpg.
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Old 02-19-2015, 08:03 AM   #9
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Old 02-19-2015, 08:44 AM   #10
usgser
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Nicely done.
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Old 02-19-2015, 09:29 AM   #11
tntmo
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I didn't think it would be interesting to me, but I'm intrigued. Cool stuff, well done!
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Old 02-19-2015, 02:56 PM   #12
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When I first built the bike I was thinking specifically about taking to shows and events to so I could say I built it. I had visions of chroming it out a little bit and trying to impress people through bling. The entire concept is unique.

However, as time went on I found out the the damn thing was stone reliable. Since I've finished it over two years ago, I've probably put about 6000 miles on it, all local. I welded some panier mounts to it and fixed some 20mm cannon ammo cans as saddlebags. With those and bungee cords for the luggage rack I can haul damn near anything that I can put in a small car. The thought behind this is why put those local convenience store/bank/post office miles on a $20,000 bike?

This picture was taken a couple of days ago and is more representative of it's workhorse nature.
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Old 02-19-2015, 03:11 PM   #13
jfman
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Quote:
Originally Posted by Banzaibob View Post
I am looking for another diesel engine to build a bike around. I figure that a typically 25hp engine on middleweight chassis could result in a bike that could reliably cruise the interstate at 80mph tops and still get over 60mpg.
Why not use the diesel engine from on of those ARTIC CAT diesel ATV's.

Are those decent engines?
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Old 02-19-2015, 06:36 PM   #14
Banzaibob OP
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I would love to have an engine out of a diesel ATV. The only problem is cost. I probably forgot to mention that the Red Devil probably cost less than $800. The engine I have been thinking about is actually a China Diesel 28hp V-twin. They are sold under various names; WinSun, PunSun, even Carrol Stream. They list for about $1500. I have also thought about getting one out of a semi-truck APU.

Diesel by nature is probably 75% more or less than gas when it comes to different measures. A 35hp motorcycle engine weighs 125lbs. A typical 35hp diesel utility engine weighs twice that if not more. That 35hp gas engine makes it 35hp at 5000rpm with a redline of 8000rpm. My 10hp diesel makes almost as much torque but makes its peak hp at 1900prm with a 3000 redline. Not to mention, small Diesels being so robust, I'll bet that a purpose built diesel ATV engine costs $9000.
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Old 02-19-2015, 08:47 PM   #15
bk brkr baker
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H-D repowered with a three cylinder Kubota tractor motor. Chain primary to the H-D clutch and tranny.
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