Search found 479 matches

by barryh
Mon Jan 15, 2018 8:33 am
Forum: Post 1970 Airheads
Topic: Redline Heavy ShockProof Gear Oil worth the cash?
Replies: 15
Views: 306

Re: Redline Heavy ShockProof Gear Oil worth the cash?

An owner who does their own maintenance will know if they are collecting water. They know where the bike is kept, the condition of sealing parts, and they have examined their oil when they change it. Cheap oil :( will significantly increase transmission wear, (this is well documented) and is terrib...
by barryh
Sat Jan 13, 2018 5:35 am
Forum: Post 1970 Airheads
Topic: Redline Heavy ShockProof Gear Oil worth the cash?
Replies: 15
Views: 306

Re: Redline Heavy ShockProof Gear Oil worth the cash?

With modern synthetic gear oils BMW's 6 month change interval seem ludicrous. Doing low annual miles I got fed up with draining perfectly clean synthetic oil out of the gearbox and final drive with almost zero fuzz on the magnets. Now I will do a sample with a syringe at the annual service and if it...
by barryh
Fri Jan 12, 2018 1:58 pm
Forum: Post 1970 Airheads
Topic: Redline Heavy ShockProof Gear Oil worth the cash?
Replies: 15
Views: 306

Re: Redline Heavy ShockProof Gear Oil worth the cash?

I thought LSD oil contained friction modifiers so while it may provide good protection is it going to be the most efficient ? This is the reason I won't use motorcycle oil in my engine. Motorcycle oil also contains friction modifiers to make wet clutches work. If you want the slickest low friction o...
by barryh
Thu Jan 11, 2018 1:34 pm
Forum: Post 1970 Airheads
Topic: Redline Heavy ShockProof Gear Oil worth the cash?
Replies: 15
Views: 306

Re: Redline Heavy ShockProof Gear Oil worth the cash?

Haven't use Redline but I have used 75W90 synthetic gear oil for years and wouldn't go back to a basic 80W90.
by barryh
Mon Jan 01, 2018 3:31 pm
Forum: Post 1970 Airheads
Topic: r100 81 fork
Replies: 9
Views: 224

Re: r100 81 fork

You will need to check your dimensions but if you replace a thin steel valve washer with the thicker plastic one but retain the old valve body then it will need the recess in the valve body machining deeper. Note my drawing above was a custom made valve washer in the original depth valve body. The m...
by barryh
Mon Jan 01, 2018 12:05 pm
Forum: Post 1970 Airheads
Topic: r100 81 fork
Replies: 9
Views: 224

Re: r100 81 fork

I made my own plastic valve washer and reduced the leakage past the damper rod sufficiently to create proper rebound damping over the last bit of travel which eliminated my clunking completely. If you want to do the minimum mods to these forks and are prepared to experiment then getting the valve wa...
by barryh
Mon Jan 01, 2018 2:32 am
Forum: Post 1970 Airheads
Topic: r100 81 fork
Replies: 9
Views: 224

Re: r100 81 fork

The update clearly shown on the right hand side in the fiche is replacement of the long solid damper valve body with a shorter sprung valve body. The spring is the same part number as the topping out spring so they just raided the parts bin. Not sure about this specific year but at some point the st...
by barryh
Wed Dec 27, 2017 5:32 am
Forum: Post 1970 Airheads
Topic: Fading hydraulic brakes.
Replies: 4
Views: 178

Re: Fading hydraulic brakes.

I refill 2 or 3 times. Gravity bleeding is no different in principle to pressure bleeding just the pressure is lower at approx. 1 psi. The advent of DOT 4 LV makes it an easier proposition due to the lower cold temperature viscosity. Most cars with ABS now specify this type of fluid so I first did a...
by barryh
Tue Dec 26, 2017 2:19 pm
Forum: Post 1970 Airheads
Topic: Oil Filter
Replies: 18
Views: 499

Re: Oil Filter

Nobody has mentioned the high pressure relief valve in the back of the filter cavity. If this valve is in good working order, filters should never collapse. The bypass valve opens and protects the filter but only up to a point. Like every safety valve it will have a variable pressure drop across it...
by barryh
Tue Dec 26, 2017 10:01 am
Forum: Post 1970 Airheads
Topic: Oil Filter
Replies: 18
Views: 499

Re: Oil Filter

My Crushed filter was a Hiflo but I've used some of them since not least because I had a stock of half a dozen of them at the time. I looked into the company first and saw their claims about TÜV quality: Hiflofiltro is the world's first and only TÜV approved motorcycle oil filter. Constructed using ...