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Search found 55 matches

by Ericandchi
Tue Dec 21, 2021 7:45 am
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

I had a rod of Titanium (6AL4V) that had been sitting on shelf for at least 30 years. We decided to use it for a rear axle. Note F750 swingarm is narrower than stock, hence it is shorter. It's also been drilled/threaded at ends to install bobbins for paddock stand.

New Ti axle next to stock steel
New Ti axle next to stock steel



Installed
Installed
by Ericandchi
Tue Nov 02, 2021 10:50 pm
Forum: BMW in Racing
Topic: Restoring #163
Replies: 32
Views: 53473

Re: Restoring #163

Just realized I never posted a pic of the fully restored bike. This was on the day it was first started - data from the file indicates 3/2/2017. I ran it around up in the mountains to break in the engine. Bike ran great and pulled solid, I admit I didn't run it up to red line. :D 163fullyrestored.jpg
by Ericandchi
Tue Nov 02, 2021 10:33 pm
Forum: BMW in Racing
Topic: Restoring #163
Replies: 32
Views: 53473

Re: Restoring #163

Heard the #163 bike was officially turned over to BMW. Not really sure why this took so many years. Supposedly it will go to a museum on east coast and be used for events in US.
by Ericandchi
Tue Nov 02, 2021 10:23 pm
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

Here is latest update. Finally got a rear tire that fits (Mitas 130/70). Not sure how well it will perform, but gotta be better than what was available 50 years ago. I do have a set on my Grom and really like them so should be fine for starters. Shocks also came in and are installed. NovemberStatus....
by Ericandchi
Thu Oct 07, 2021 8:38 am
Forum: R90S World
Topic: 1975 BMW R90S Restoration
Replies: 2
Views: 2322

Re: 1975 BMW R90S Restoration

What are you looking to do? A light freshening up or a 100% rebuild including, replace all seals/bearings, valve job, and vaper blast cases? Budget and your timeframe could be a factor too. If you want a full top notch restoration you may need to ship engine. Not sure if the site allows posting shop...
by Ericandchi
Thu Sep 30, 2021 8:36 am
Forum: BMW in Racing
Topic: Sidecar Racing
Replies: 2
Views: 13243

Re: Sidecar Racing

Very nice. More pics is you have some.
by Ericandchi
Tue Aug 10, 2021 7:40 am
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

Here is a pic with original tank which I modified so we could keep starter motor. Note top of engine not cut off and we bought one of those 1 piece covers. Not sure how I feel about the cover...gives it a sort of vintage vacuum cleaner look. Seat needs some cleanup. [attachment=0]tank_seat.jpg[/atta...
by Ericandchi
Wed Jul 28, 2021 9:41 am
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

We've made good progress in the last few weeks. I brought the vapor blasted cases up to my dad's so we could build up the engine and get it into the frame along with the transmission. We temporarily put the carbs and tank on for fit checks, all looks good. We have a set of 38mm stainless headers tha...
by Ericandchi
Mon Jun 21, 2021 8:05 am
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

Latest progress. Note the crankcase is a spare R90s. The engine we will use is still with me in Texas ready for rebuild when I get up to dads next month.

I ordered tires this week so soon it will be easier to roll around.

F750 in Progress
F750 in Progress
by Ericandchi
Fri Jun 11, 2021 8:56 am
Forum: BMW in Racing
Topic: Rebuilding an F750
Replies: 39
Views: 69827

Re: Rebuilding an F750

We had a slight change in plans over the past few weeks. I initially we were going to use a set of magnesium Brembo calipers from the mid 80s, but we have been unable to source new seals. Unfortunately we discovered this after all the mounting hardware was made. I located a new set of Brembo caliper...