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Old 11-20-2012, 01:06 PM   #151
jsullivan OP
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Quote:
Originally Posted by isdt BMW View Post
I'm not too sure thet unequal length pipes and a 2 into 1 exhaust lose power, my little R-50 ISDT runs really good, other guys with the same motor say mine pulls better and revs faster. I did lighten the flywheel. On my current R-75 ISDT project, I copied the pipes used by Herbert Scheck on the factory supported ISDT bikes, they never seemed to be at a loss for power. There may be a performane difference, but in regular use maybe it doesn't matter.
Good to know - thanks! I'm just going to use this to run around town and play on country roads, nothing too intense.
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Old 11-20-2012, 07:20 PM   #152
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Originally Posted by jsullivan View Post
Good to know - thanks! I'm just going to use this to run around town and play on country roads, nothing too intense.
I have run the R-50 in vintage enduros for 10 years, a lot of woods and single track, it has never missed a beat. I'm making the R-75 due to a broken femur, and the fact that my 6'2" frame gets cramps on the old 1957 R-50. I used a 78 Husky WR seat and front fork on the R-75, seat height is 37" (much more comfy)
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Old 11-20-2012, 11:05 PM   #153
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1. The bars are cheap Magura Euro copy from here, part # 65-00044.

2. There's a single bolt near the middle of the seat pan that goes down through a crossmember that I welded on the subframe that attaches with a wingnut. I epoxied the bolt in place from the top side before adding the seat foam. I plan to add a tongue to the front edge of the seat that will slip into the backbone of the frame like my r100gs has to help keep things situated.
Thanks for the quick reply bro.

Did you cut off the original crossmember that the stock seat locks into?

Did you keep that little 'fender bracket mount' at the rear of the frame too?

I would be eternally grateful if you posted a pic of the modified subframe (so I can copy it)

I have the subframe at work with me today & i'm eager to start hacking it's ass
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Old 11-26-2012, 06:25 PM   #154
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Nice build, what if any effect will the uneven header lengths do?

I was told once that the Subaru car sound was caused by their uneven header system.
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No idea. If it's not a total dog when I'm done with it, I'll be happy. If it is, I'll redo the exhaust in a simpler manner.
i'd be more worried about the big honking hole in the one pipe. unless of course you're adding fuel injection and that's for the O2 sensor.
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Old 11-30-2012, 02:41 PM   #155
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Cool build! Just got this tire on the rear of my G/S and it looks great! We'll see how it does in the dirt next week ;)
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Old 01-20-2013, 06:39 PM   #156
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I've been playing with this thing again. Headlight and taillight are mounted. I put a big crusty tank on it, and I'm liking it.





I remade the crossover pipe per some good feedback earlier in the thread.







So, in summary... I've done nothing.
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Old 01-20-2013, 07:59 PM   #157
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Damn, that header is a work of art! I really like the curvy section crossing the front of the motor! Mine is almost straight, and I am not real happy with it, I may have to cut it up, and do some copying...Sorry
Looks great, you have a real eye for style!
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Old 01-21-2013, 10:56 PM   #158
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Base gasket on the left cylinder looks a little wadded.
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Old 01-21-2013, 11:26 PM   #159
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Base gasket on the left cylinder looks a little wadded.
It looks like a melted red plastic bag?
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Old 01-22-2013, 12:05 AM   #160
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well, that, and the side stand looks like it weighs a ton!
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Old 01-22-2013, 05:19 AM   #161
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It looks like a melted red plastic bag?
It's the new high tech shop rag to catch the vinegar dripping from from the nasty gas tank...
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Old 01-22-2013, 01:18 PM   #162
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Great looking
Can i ask how wide tires you are using and what brand ?
Got a 60/5 -72 myself and want to squeeze in the fattest possible tires :-)
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Old 01-22-2013, 01:23 PM   #163
jsullivan OP
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well, that, and the side stand looks like it weighs a ton!
You think it'll drag in the turns???

Quote:
Originally Posted by jocce View Post
Great looking
Can i ask how wide tires you are using and what brand ?
Got a 60/5 -72 myself and want to squeeze in the fattest possible tires :-)
That seems to be the primary question I get on this build - they're 4x18 Pirelli MT43's front and rear (note the 18" rim up front isn't stock). I can't say how they handle other than they roll around the shop really nicely...
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Old 01-22-2013, 02:11 PM   #164
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oh!! and an uncharacteristically unsarcastic comment. that's the bestest looking tank i've seen on this build. keep it if'n you can.
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Old 01-22-2013, 02:16 PM   #165
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oh!! and an uncharacteristically unsarcastic comment. that's the bestest looking tank i've seen on this build. keep it if'n you can.
I agree - the big tank stays. Even if this one is too spanked to use, I'll find another.

On that note, does anyone have any advice on pinhole repair? This tank has got a few leaks. I'm thinking silver solder the holes then line it with the good stuff.
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