ot Where can I find mods for an airhead.
 

Hi all,
I'm updating my 95 R100RT and am looking for a source for parts.
I'm looking for the re-enforced Al tripletree top bracket.
I'm also looking for aftermarket exhaust or mufflers.
anythoughts?
thanks
jeff

http://www.bobsbmw.com/
they've got the upper triple tree, lower fork brace, and very probably aftermarket mufflers &/or pipes.

http://www.webparts.com/

They have everything BMW.... they've helped me rebuild my r90.

oh wait... you want aftermarket parts. Never mind.

http://bikes.sjbmw.com/docs/home/home.asp

Call Chris.
I am sure he can get you anything and whatever level of mods you want to go to.

Jeffro,
For some update stuff at pretty good euro prices and good service try MotoBins.

at the current exchange, their prices are horrible.
Good deal 2 years ago though

JAMA pits were alot less expnsive repros when I did got mine. I'd consider Staintune though...
CC Products made the cast tripletree I have (San JOse BMW) and are now billet. Very reasonable.

http://forums.pelicanparts.com/uploa...1107552200.gif

CCProducts is the airhead bestusess...:cool:

Depending on the year, you'll want to move up to the handlebar mastercylinder. Motobins has the kit. Cheap!

again, parts are cheaper domestically.

The '95 already had the handlebar mounted master cylinder so nothing to do there.

Get rid of the air injection smog system - it over-heats the valves and warps the head. Looks ugly too.

Get Roger's cartridge emulators for the front end when he's done perfecting them. It's possible that Race Tech already has some set up for your bike - they have them developed for the R100GS and it's possible your forks are the same.

Put an Ohlins or Works, or one of those other great shocks, on the rear.

Find some heads with the big valves and 40mm spigots. Install 40mm Bings. Then you'll bump your mileage up from 38 or less, to the mid 40s or better. And performance will improve too.

If you have problems keeping the battery charged, install an Omego 400 watt system. About a buck a watt.

With the exchange rate as sucky as it is, nothing is to be gained getting your parts from England. It's true Motobins has a lot of neat stuff, but you can get it all over here too. Even if the part comes up to the same price as here, the shipping will be a lot more.

I forgot - a manufacturer of stainless exhaust systems is located in Ohio - called EPCO. You might check them out, but I don't know how they compare, price-wise, to Staintune. The staintunes are pretty, that's for sure. But I have seen some EPCO mufflers and they looked good too.

Right-o I see now it's a '95, very little to do to improve it other than loosing the cat/smog like tvrla sez, and some bracing maybe. It's got a monshock doesn't it?

Right-o I see now it's a '95, very little to do to improve it other than loosing the cat like tvrla sez, and some bracing maybe. It's got a monshock doesn't it?

Definitely monoshock already that year.
RT has some off the shelf emulators for one that late too.
Not the same as GS (showa vs Marzocchi) but still
available. Not sure they're tuned it optimally, but even
then, it will be a big improvement over stock. The emulators
and a good rear shock are the most performance bang for the buck.
Sidebraces are about the only other chassis mod to make a diff on
that model. Perf-wise, all the already mentioned stuff is good.

The old guys are a bit like our S. Everything is already pretty balanced.
Carbs, exhaust, heads etc will each, alone, net you only a tiny bit. All together they offer a pretty nice performance increase, but only so much. Remember, these guys only have about 1/4" lift.

I think the biggest single performance improvement, especially if you'rae starting out with an R80 or R90, is a big bore kit. Even for the R100 motors, you're getting a significant compression increase on top of your displacement bump. They work fairly well with stock intake/heads/exhaust too, as those things are only truly restrictive above about 5500rpm. You get a very nice mid to low rpm bump from the big slugs and jetting alone. In fact, they work better on the bottom end with the stock intake/carbs and a slightly opened exhaust. Great gas velocity and carb metering and torque and throttle response. Since all the hard part (boring) is farmed out. It's actually easier than adapting big carbs (barring a turn-key kit for those) or at least as easy anyway. I've done it both ways, and a big bore kit with stock other stuff works better than stock bore and modified carbs AND jetting AND valvework, AND exhaust etc etc. Cheaper than all of those put together too. And it gives a better boost from bottom-end to upper-midrange, where many of us prefer our performance.

Not the only way to go by _any_ means, but worth considering.
Boring works intimidates some and sounds tougher than just doing
intake/exhaust stuff and thus I believe is often overlooked or shortchanaged when comparing options.

Just throwing out food for thought.

As usual, suspension and seat-time/track-time will do more for you than anything in the motor department.

I rode an R100/7 one time that had 32mm Mikunis. Stock heads with the small valves and all that. Only difference was the carbs. That was on STRONG bike!

Since the '81 - on bikes had lower and lower compression, I suspect what Roger says is true. With the ****ty gas available these days we really need the higher compression. Also, I generally don't run my bikes over 5,000 rpm. In top gear, that equates to around 90mph. Not that I wouldn't like to...

I generally don't run my bikes over 5,000 rpm

on the big twin beemers, life just begins at 5K!! really, these ain't no stinkin' Harkleys.

Sure, they'll run at 6 or 6,500. I've heard of guys who rode them close to red line a lot, but they did pay the price. The smaller displacement models need to be ridden at higher rpms. But the larger ones seem to have plenty of power without red lining it. I guess if you're into hot rodding, they'll hold up for quite a while.

But it's a bit like making a race car out of a Volvo. They weren't really designed for that. And these old beemers really are a lot like old Volvos. If you want to wind it up to pass, that's one thing, but I don't know of many places where you could ride it for very long in fifth over 5000 rpm without getting a ticket.

tvria,
where I live 5000 rpm in 5 is freeway speed.
Bike runs fine all day like that.
jeff