Shake down run

[clonmore1]

Took my now completed 65 for its second and longer shake down run.

Objectives were to scrub off the new tyres, check and test brakes, new suspension and general running.

Overall, she ran well other than what appears to be a sticking throttle when warmed up, the front brakes were poor as expected with new pads and almost no use, I really hope they improve with use, anybody else experienced this with theirs. The back brake was excellent.

The progressive springs and new rear shocks presented no problems as yet, but I didn't push the bike because of new tyres and the fact that I am running in the engine, be interesting to see how they are once I can use the bike to its potential.

I think I have made a mistake with the bars I selected, they are the short flatter bars as specified for an 81 R65? Anyway I am leaning forward so will assess these over the summer to see if I can live with them or change for a set with a higher rise.

Will investigate the sticking throttle, the bike isn't easy to start from cold, could there be a correlation?

I'll post some pictures up on the restoration section shortly.

[Barry]

Will investigate the sticking throttle, the bike isn't easy to start from cold, could there be a correlation?

The enrichers rely on the throttle being fully closed to function so if it's sticking open you won't get much enrichment.

On the brake pads just washing the bike or even cleaning the discs with brake cleaner is enough to make my front brake feel very weak until they have had some use.

[clonmore1]

Thanks Barry,

I am sure the throttle is the problem then. First place to start.

[Monman]

I too took my R65 out yesterday for it's first run in my ownership.
The bike ran great and everything seemed pretty good.
More than enough power for what iI need and even the brakes were adequate  which I'd read can be quite poor, my only issue was that the bike seemed to idle highly when you shut off. The same as your problem Chris.
The bike starts easy when cold and ticks over fine when first started.
Let me know what the issue is with yours if you manage to resolve it.

Good luck.

[clonmore1]

Will do Monman.

Had the previous owner visit the bike this afternoon, he hasn't seen/heard it running since 2000.

He said it always started on the button from cold or hot, so some work to do to see what the problem is.

Thanks

Chris

[Bob_Roller]

The usual causes of a high idle once the engine is warmed up, is performing a carb synch when the engine is not up to operating temperature .

Also the intake and exhuast valves not at the recommended clearance will play into this as well .

If these two things don't solve the problem, it may be the ignition advance mechanism in the ignition canister at the front of the engine .

[clonmore1]

Checked the choke cable and see that there is almost no movement of the cable from the fully on to half on position on the right side of the bike (sat on the bike). I checked through snowbums site re enrichment & associated problems, he refers you to a YouTube video on how the enrichment circuit works. As the carbs have been stripped down, cleaned and then rebuilt, it could also be errors in the rebuild, the Bing CV carb seems to be somewhat complex and needs to be properly put back together with little room for error.

I will also checked Bob's point re carb sync, valve clearance and the electrics, all good points to check and factor in.

Other than the fast idle and difficult cold starting, she runs well, seems to have plenty of usable power ( not gone over 5k yet) and handles nicely at the speeds I have ridden her.

Shake down run No 3 is scheduled for Weds, so I'll check back in for an update following that.

[ch128077]

[Lordcargo]

I just got my R65 which had a minor refurbishing done including front break rebuild. The seem to be getting slightly better with use.

[clonmore1]

Shake down run 4

Did around 65 miles, mix of fast country and city riding with a test ride on a Triumph Tiger 800Xc in-between.

Carbs were removed and cleaned again, rebuild checked, carbs were sync'd after a 10 mile ride, that seems to have cured the high idle.

However, cold starting remains an issue.

I have ordered new choke disc's to see if this can assist the enrichment issue.

Had a misfire (intermittent) on the way home from the test ride, need to keep an eye on that, could have been a dirty fuel issue or could there be a developing problem with the ignition coils?

Otherwise, she ran well, managed to get some decent speed/bends in to build my confidence in the handling, the front seems a little light, but she tips in nicely.

Brakes are improving.

Couldn't believe the amount of interest she generates, at the dealership where we did the test ride, loads of guys were coming up and talking/asking questions, even had an offer to buy her!

I'll report back when the choke discs arrive and fitted.

Cheers

Chris

[Barry]

I have ordered new choke disc's to see if this can assist the enrichment issue.

Just curious. Did then choke discs have 3 fuel holes or 4 ?

There was a service bulletin in Jan 79 to modify the choke discs by drilling a 4th hole and enlarging the counterbores. It made a big difference to my 79 but I would have thought they had used the modified discs by 81.

[clonmore1]

Good point Barry,

I'll check. My bike was manufactured on the 7th January 1981, but I have the ATE braking system not the Brembo set-up, could be this is the issue?

Hmm...

[Bob_Roller]

Do you still have the original OEM black and gray ignition coil ??
Did you rebuild one carb at a time ??
The enrichment ' module ', is side specific, so if you got them mixed up, it may be an issue .