The BMW GS boxer twin thread

[Kokopelli]

That's applegate, i hate phones don't have his nu,ber but he should be in the phone book
D

see if you can get hold of darryl applegaye from the bmwor helives in whangarei and has an airhead i am in ohakune at the moment if you can make it to waimauku you can take stuff of my bike

[igormortis]

Checked the carb diaphragms as per Steve's suggestion. Both look good. I'm suspecting the ICU now. It's getting quite hot. How hot do they get?

Video of problem: http://www.youtube.com/watch?v=WPHEyy_thDI

[Pampera]

My "new" R80GS was only returning 40 mpg with gentle riding. It has allegedly had the carburettors rebuilt this year but this economy suggests maybe not very well.

Ordered the Bing #6 kit (everything up to and including new floats) on the 20th and this arrived this week. Whatever may be wrong or worn, this will make it good.Michael

Mission accomplished.
After one backtrack, RH throttle butterfly "slipped" while securing it back in place with resulting air leak and fast idle, bike back together and running properly now. Torqued the heads, checked the valves and checked the timing. Finally, squirted the back of the "beancan" with some CRC electrical fluid and it seems to have stopped holding onto the revs when closing the throttle so perhaps this freed off a sticky advance/retard.

Economy has shifted from about 13 km/l (37 mpg) to 17.6 km/l (50 mpg), which is about right for an 800, albeit pretty poor for a bike this gutless!

Recomissioned my partly dried out Motion Pro mercury carb balencer using some donated mercury but with two minor spills of this highly toxic and difficult to corral back up again liquid, during this process I think it is time to retire this and get a safer and less environmentally damaging one. I see Motion Pro now make a non mercury (safe) manometer balancer so perhaps one of these is in my future.

Terrible gearbox (second worst in seven two valve twins owned), so after the carb test ride I refilled with full synthetic 75-90. This flatters a poor flat twin gearbox more than a mineral 80 or 90, so we will see. However, quite a lot of fluff on the drain magnet, lots more than I have ever seen before, so perhaps more drastic surgury is going to be needed in the future..............

Starting to remember why I moved from an R80G/S to a new F650 Dakar in 2001!

Michael

[Aslan]

nice looking example Michael! Would love to add it to my garage

[Box'a'bits]

Just an update. Igor has made contact with Darryl Applegate (BMWOR) at Whangarei. He may have a spare ICU to test Igors. It isn't the carb diaphrams.

[Pampera]

nice looking example Michael! Would love to add it to my garage

Just finished cleaning up tools and draining the old gearbox oil into my storage container. A sheen of fine bronze filings in the bottom corner of the drain pan, so you might be welcome to it! Something tells me that synthetic gearbox oil is probably not going to smooth this one out.

Cosmetics and chassis are well above average though.

Michael

[igormortis]

Update: Daryl came to meet us. Unfortunately he did not have a working ICU at hand, but we managed to rule out the coil and some dodgy wiring to it.

What's left is to test with a working ICU from Daryl's bike once we can get ours to his place. Still haven't ruled out the bean can.

Bike runs strong, until the ignition seemingly cuts out, then backfires loudly when it cuts in again.

Thanks everyone for your offers of help so far. Will keep you updated.

[BMWST?]

Update: Daryl came to meet us. Unfortunately he did not have a working ICU at hand, but we managed to rule out the coil and some dodgy wiring to it.

What's left is to test with a working ICU from Daryl's bike once we can get ours to his place. Still haven't ruled out the bean can.

Bike runs strong, until the ignition seemingly cuts out, then backfires loudly when it cuts in again.

Thanks everyone for your offers of help so far. Will keep you updated.

mine has done that twice in the time i have had it both times has restarted(actually three the second time was the beancan when it would very nearly restart but not quite

[igormortis]

Went around to Darryl's this morning and tested his ICU, ruled that out and discovered it was the bean can. Swapped ours for Darryl's and we are now on the road again!
Huge thanks to Darryl, Steve and Alex for the help. And also to Jay & Cia for rescuing us and putting us up for the night.

[Padmei]

Here's a pic of Kane on his R100 at the Nelson Port races this year. I have to admit when I get on mine for a pootle there is no way I could imagine a BMW could be as fast as his.
When I saw his entered I mistakenly thought he would be sitting around mid field - but nope he was ripping it right off the front. He couldn't seem to hold off the Guzzi tho.

http://www.pbase.com/kiwi_g/image/140724169

http://www.pbase.com/kiwi_g/image/140724165

[Kickaha]

Here's a pic of Kane on his R100 at the Nelson Port races this year. I have to admit when I get on mine for a pootle there is no way I could imagine a BMW could be as fast as his.
When I saw his entered I mistakenly thought he would be sitting around mid field - but nope he was ripping it right off the front. He couldn't seem to hold off the Guzzi tho.

http://www.pbase.com/kiwi_g/image/140724169

http://www.pbase.com/kiwi_g/image/140724165

It's a quick bike with a good rider but BMW twins have a long race history, look up the Butler and Smith bikes or the multiple world championships in sidecars to name a few

His is probably the quickest one currently racing but there are 3 others I know about as well

[GSers]

Mocked up a tank today a quick measure with a plastic bag and water fitted in about 15 litres that along with the YZ tank 7 litres 22 litres all together thats not bad standard tank is 24 litres.

GSers

[BMWST?]

he has no back brake rod does he!?Guzzi seems to lean over a bit more in the corners and seems to have a wider rear tyre(more grip?)

[NordieBoy]

This guy?

[Padmei]

he has no back brake rod does he!?Guzzi seems to lean over a bit more in the corners and seems to have a wider rear tyre(more grip?)

The Guzzi has way more power I think. I watched as the guzzi took him on the outside of one the back corners. I asked Kane how many horse power & what kinda speeds he gets out of the bmw but he didn't know. He hasn't bothered putting it on a dyno.

I was watching how low he was cornering on this tight track & the heads still had a fair bit of daylite between them & the road. I was surprised.
Good pics nordie.