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ZX Rider
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   Posted 1/18/2012 5:25 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
One of the Harley riders at work was thinking about buying a BMW and chopping it. Right off the bat I ask him why? Told him that it would be the worst choice ever. The Beemer riders would hate you, the metric riders would hate you, the fraction/metric riders would despise you. He want's a chopper that will handle, with some grunt, and travel long distance with good comfort. Also it must look cool. Any suggestions? 


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el SID
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   Posted 1/18/2012 6:14 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
Well, if you can get rid of the chopper part of the equation, yeah tons. If not, then no. A chop, isnt a handler, or very comfortable. I say let him at it. It hasnt been done yet.


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Andy VH
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   Posted 1/19/2012 7:18 AM (GMT -7)    Quote This PostAlert An Admin About This Post.
He wants a chopper that will handle? Umm,....isn't that an oxymoron to begin with?

If he is thiking about using a typical current BMW flat twin with the Telelever front end he'll have numerous challenges if he thinks he can rake out the front end, or extend the fork legs. The Telelever front end is a LOT more different than a typical front fork although they look very similar. There is very little "chassis" or frame on the current BMW's with Telelever front ends because the engine/crankcase is actually a major chassis component. You just don't go modifying the front end and hope the higher chassis loads imposed on the engine cases will take it. Front end geometry of the Telelever is not condusive to the typical goals of raking/extending a front end.

Now, if he plans to use an older (pre-94) air colled BMW twin then he is working with a typical telescopic front end. I have seen BMW choppers on the NET and some look "ok", and may even handle much better than the typical chopper. The engine, drivetrain and chassis reliability would certainly be there. But also, if he has thoughts of lumbering down the road Harley style of 2500 rpm at 70mph, that aint gonna happen. An air cooled BMW at 70mph would be turning over 4,000 rpm, so the bike feel is entriely different that that of a typical Harley.

Maybe he should just buy a BMW R1200C model (the BMW cruiser) and modify it to make it a long distance cruiser, but it aint a chopper either. As to the attitude of others to his bike choice, I say screw it, and ride what you like! It wouldn't be anything that I'd want to ride, but it's his butt on the bike, not mine.


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martinjmpr
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   Posted 1/19/2012 7:45 AM (GMT -7)    Quote This PostAlert An Admin About This Post.
ZX Rider said...
One of the Harley riders at work was thinking about buying a BMW and chopping it.
 
rolleyes   Tell him to stop huffing paint thinner.  Stage an intervention if you have to. 


Martin
 
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Racer1
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   Posted 1/19/2012 8:51 AM (GMT -7)    Quote This PostAlert An Admin About This Post.
A Boxer twin chopper?

This has the potential to be the fugliest thing on two wheels - I say let him at it... there's a thin line between madness and genius and if he can pull this craziness off I'll personally buy the man a drink!
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Smitty
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   Posted 1/19/2012 10:05 AM (GMT -7)    Quote This PostAlert An Admin About This Post.
I definately go along with Racer 1.  What sort of brain does this fool have, if any?


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jclax01
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   Posted 1/19/2012 12:29 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
The thing about a chopper is that they take off all of the unnecessary weight that they can. so the little ugly BMW suddenly takes its "clothes" off ???? Naw thats not a good look in if I am just seeing it in my head.


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jhawk
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   Posted 1/19/2012 3:53 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
jclax01 said...
The thing about a chopper is that they take off all of the unnecessary weight that they can. so the little ugly BMW suddenly takes its "clothes" off ???? Naw thats not a good look in if I am just seeing it in my head.

Not only would it be ugly, it'd be damn hard and stupid to do. Most BMW don't carry much, if any "unnesessary weight" so there's not a lot there to chop in the first place. On the un-faired R-series, about all that could be chopped is the passenger seat/tail section, front fender and gages - none of which makes sense to remove; and do not weigh much either. The motor is integral with the frame; the front and rear suspension are bolted directly to it. A BMW chopper would have to be based on one of the older tube frame models. The guy could start with a $15K to $20K classic and wind up with a $2K chopper.


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ZX Rider
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   Posted 1/19/2012 5:58 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
He got his arse kicked by a Honda Fury/furry, what ever, packing double last year. He likes the look of the Fury but can't go rice. I told him about the inline six touring bike BMW, said It had too much power. I suggested that he buy an S/S motor as a drop in. Too pricey, How about a NOS shot of 50 hp+?. You just need a broom to pick up the parts. He is going to the grey side, dead set for a Beemer.


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Post Edited (ZX Rider) : 1/20/2012 1:05:24 AM GMT

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Andy VH
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   Posted 1/19/2012 6:22 PM (GMT -7)    Quote This PostAlert An Admin About This Post.
A good running Airhead (air-cooled) Beemer 1000cc makes about 60hp, comparable with a HD, but no were near the torque. A Beemer has to be spinning faster to make the power. The Airhead engine is not integral to the frame, so the bike has a traditional frame which can be modified if that is his plan.

A good running Oilhead (the newer oil/air cooled) Beemer makes anywhere from 60hp for the R1200C, all the way up to 110hp for the R1200R, with good torque. An older R1100R makes about 90hp, and the R1150R makes about 100hp. But none of them are good bikes to chop because the engine is basically the major part of the frame, and all those Oilheads feature the Telelever front end which is not a good idea to mess with.

An Airhead or Oilhead Beemer actually has more load carrying capacity than most any Harley, even though the BMW weighs 200 to 300 pounds less than a typical big twin Harley.

But if he wants something like a BMW cruiser with some decent power, then instead of messing with the bike and frame, just get an R1200C (that's the cruiser model) and see what he can do to get higher power out of it (like a turbo maybe). But the R1200C is limited by its single throttle body intake system and twin exhaust, compared to the other Oilhead having two throttle bodies and much better breathing. Also, the R1200C rear driveshaft design limited the power it can handle.

Nitrous on a BMW may actually work for intermittent duty, the bottom end on those Oilheads is pretty robust.

Sounds to me he'd be better off to stick with a Harley and just get a S&S motor for it. Or change brands to a Victory.


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Hellfighter
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   Posted 1/20/2012 11:55 PM (GMT -7)    Quote This PostAlert An Admin About This Post.

 

Yeah....... nuhhh


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jclax01
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   Posted 1/21/2012 4:03 AM (GMT -7)    Quote This PostAlert An Admin About This Post.
my god is that ugly.


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Smitty
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   Posted 1/21/2012 10:14 AM (GMT -7)    Quote This PostAlert An Admin About This Post.

I did not think we would see such a piece of crap, but there are two of them.  I am about to puke!!!!!!!

Agree with you jclax for those are ghastly to say the least.


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