My purple airhead scrambler thing project - Page 11

jsullivan · 11-20-2012, 01:06 PM

Quote:

Originally Posted by isdt BMW

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.

isdt BMW · 11-20-2012, 07:20 PM

Quote:

Originally Posted by jsullivan

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)

wezzz · 11-20-2012, 11:05 PM

Quote:

Originally Posted by jsullivan

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

Dorzok · 11-26-2012, 06:25 PM

Quote:

Originally Posted by Eddieb

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.

Quote:

Originally Posted by jsullivan

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.

Cdubs · 11-30-2012, 02:41 PM

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 ;)

jsullivan · 01-20-2013, 06:39 PM

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.

Houseoffubar · 01-20-2013, 07:59 PM

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!

Dorzok · 01-21-2013, 10:56 PM

Base gasket on the left cylinder looks a little wadded.

disston · 01-21-2013, 11:26 PM

Quote:

Originally Posted by Dorzok

Base gasket on the left cylinder looks a little wadded.

It looks like a melted red plastic bag?

Houseoffubar · 01-22-2013, 12:05 AM

well, that, and the side stand looks like it weighs a ton!

jsullivan · 01-22-2013, 05:19 AM

Quote:

Originally Posted by disston

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...

jocce · 01-22-2013, 01:18 PM

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 :-)

jsullivan · 01-22-2013, 01:23 PM

Quote:

Originally Posted by Houseoffubar

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

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...

Dorzok · 01-22-2013, 02:11 PM

oh!! and an uncharacteristically unsarcastic comment. that's the bestest looking tank i've seen on this build. keep it if'n you can.

jsullivan · 01-22-2013, 02:16 PM

Quote:

Originally Posted by Dorzok

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.

01-20-2013, 07:59 PM	#157
Houseoffubar fine beer sampler Joined: Dec 2010 Location: Bothell, Washington Oddometer: 1,557	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! __________________ Performance Welding Service 1978 R100/7 Build thread 1915 Boardtrack racer replica (Electric Powered) Lots of bicycles Hemp: The strongest natural fiber in the world, and the most nutritious plant on earth.....why is this illegal again?

01-22-2013, 12:05 AM	#160
Houseoffubar fine beer sampler Joined: Dec 2010 Location: Bothell, Washington Oddometer: 1,557	well, that, and the side stand looks like it weighs a ton! __________________ Performance Welding Service 1978 R100/7 Build thread 1915 Boardtrack racer replica (Electric Powered) Lots of bicycles Hemp: The strongest natural fiber in the world, and the most nutritious plant on earth.....why is this illegal again?

01-22-2013, 01:18 PM	#162
jocce Adventurer Joined: Sep 2012 Location: Uppsala Sweden Oddometer: 33	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 :-) __________________ Old fart, but sometimes the horn grows

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

11-30-2012, 02:41 PM	#155
Cdubs made for adventure Joined: May 2011 Location: SF, CA Oddometer: 66	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 ;)

01-20-2013, 06:39 PM	#156
jsullivan ^OP Gnarly Adventurer Joined: Mar 2010 Location: Weatherford, OK Oddometer: 104	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.

01-21-2013, 10:56 PM	#158
Dorzok Beastly Adventurer Joined: Jun 2008 Location: SoCal Oddometer: 1,408	Base gasket on the left cylinder looks a little wadded.

01-22-2013, 02:11 PM	#164
Dorzok Beastly Adventurer Joined: Jun 2008 Location: SoCal Oddometer: 1,408	oh!! and an uncharacteristically unsarcastic comment. that's the bestest looking tank i've seen on this build. keep it if'n you can.