Search found 30 matches

by JohnT
Sun Aug 24, 2025 1:54 pm
Forum: Post 1970 Airheads
Topic: r100r mystic speedo trip reset button
Replies: 4
Views: 3651

Re: r100r mystic speedo trip reset button

Thanks Kurt. Didn't expect such an odd thing to be available so never looked.
by JohnT
Sat Aug 23, 2025 11:25 am
Forum: Post 1970 Airheads
Topic: r100r mystic speedo trip reset button
Replies: 4
Views: 3651

Re: r100r mystic speedo trip reset button

Anyone in the UK do them?
by JohnT
Sun Aug 10, 2025 4:18 am
Forum: Post 1970 Airheads
Topic: Hi from London England!
Replies: 29
Views: 216250

Re: Hi from London England!

You may have all ready done this but both gauges should initially be set off the same carburettor.
by JohnT
Thu Jul 24, 2025 10:12 am
Forum: Post 1970 Airheads
Topic: R50/R60 accelerator pump
Replies: 5
Views: 72408

Re: R50/R60 accelerator pump

Thanks for reply's. As you say a crude none return valve. An extra squirt of fuel just off idle as if the carburettor has an inherent flat/weak spot.
by JohnT
Wed Jul 23, 2025 6:30 am
Forum: Post 1970 Airheads
Topic: R50/R60 accelerator pump
Replies: 5
Views: 72408

R50/R60 accelerator pump

Could someone explain how this thing works. Have been unable to find either a good diagram or explanation.
I don't have a bike with this type of carburettor, waiting for a suitable R60/6 to appear on Ebay, but like to understand the inner workings.
by JohnT
Thu Jun 19, 2025 10:58 am
Forum: Post 1970 Airheads
Topic: R100R throttle cables
Replies: 2
Views: 2545

Re: R100R throttle cables

CIMG2608.JPG This is my temporary bodge to prove a point. it keeps both cables together and held tight into the twistgrip body with a cable tie. Its worked for 100 miles and has enabled me to balance the carburettors. I think the best solution is to convert to a single cable with a bit more length ...
by JohnT
Wed Jun 18, 2025 6:47 am
Forum: Post 1970 Airheads
Topic: R80 electronic ignition issue
Replies: 11
Views: 3654

Re: R80 electronic ignition issue

Have found this very interesting and agree that using the manufacturers recommended parts is the obvious solution as they will have spent much time and money developing. Now I used to run a 1985 R80 with electronic ignition which had an intermittent ignition fault that I could not find. As it was my...
by JohnT
Sun Jun 08, 2025 8:23 am
Forum: Post 1970 Airheads
Topic: ethanol CH3CH2OH
Replies: 6
Views: 6333

Re: ethanol CH3CH2OH

In the UK we have E5 and E10. The only thing I notice is it the idle speed is higher with E5, more combustible?
by JohnT
Fri Jun 06, 2025 3:36 am
Forum: Post 1970 Airheads
Topic: Loose cylinder head stud? Is this normal?
Replies: 9
Views: 4908

Re: Loose cylinder head stud? Is this normal?

I have this problem on my R100R and and fighting shy of carrying out this fix in case it compromises head gasket sealing as only one rocker is affected and would require two head nuts to be slackened.
Did you have any of these problems?
by JohnT
Sun May 18, 2025 10:46 am
Forum: Post 1970 Airheads
Topic: R100R throttle cables
Replies: 2
Views: 2545

R100R throttle cables

Have owned two R80's over the last 30 years, one twin shock the other mono. Both had a single throttle cable to a junction box under the tank then separate cables to each carb, never any problem. My recently acquired R100R has two cables from twist grip to carbs. and are proving to be a pain due to ...