GS1100G Road Runner Project

[londonboards]

Steve - thou and inches!

Greetings

[Steve]

Charlie - Good point. I did all the valve clearances and no. 1 cylinder has the largest clearances of all of them - between .007 and .009.

Greetings

Just making sure here, is that "seven to nine thousandths of an inch" or a mis-type that really means "seven to nine hundredths of a milimeter"?

[londonboards]

Charlie - Good point. I did all the valve clearances and no. 1 cylinder has the largest clearances of all of them - between .007 and .009.

Greetings

[Charlie G]

Question from a novice: Are the valves with specification? Is # 1 closing completely?

cg

[londonboards]

My Baby Spits Fire At ME !!

It was a beautiful day here today and I just had to give it a go. Got the bike insured and set off.

My newly refurbished brakes we just about good enough after some pumping. I expect they will bed in after a while.

The motor was not as smooth as I remember them being and when I got home I checked the plugs and took off the header pipes and ran it without them for a little while. No. 1 cylinder is overly rich and spitting fire at me.

See: My GS1100G - Road Runner Project Blog - It Spits Fire





No. 1 looks like this:



the others are like this:




See the: Fire Spitting GS1100 Video

[hampshirehog]

Duff plug? That's what it was on Simon's bike. Simple one to check anyway, swap the plugs around.

that "fire spitting" with the pipe on would just be popping and I would sync the carbs and hopefully it will stop... cue an expert?

[londonboards]

Crap Torque Arm Bolt

Need to be a little careful with this bike now. Obviously the PO was into short cuts. Why would you replace one of the most crucial bolts on the bike with a dime store look a like?

This is what I found on the rear torque arm:



I am not an engineer. But even I could guess that this bolt is going to be subject to a huge amount of shear when the brakes are fully applied.



So let's get a proper one please:

[londonboards]

Hampshire - I bit the bullet and bought some OEM from Robinsons. I will use those on my restoration project and the others I had "in stock" were K & Ls I got from Canada. so those are going in my Road Runner Project.

[hampshirehog]

send Nick Chambers (RD bitz) an email:

http://www.rd-bitz.co/contact.htm

He sells stainless pistons for loads of bikes, not just Yams, and he's half the price of anyone else I've found. Good service as well.

And another confirm on those old pistons - paperweights only now.

[steveb922]

Understand your point re Robinsons! I just bought a set of stainless pistons from Wemoto - just under £60. The pistons and seals were good quality, but the boots were rubbish. Fortunately my old ones were ok to re-use.

[londonboards]

Agemax - thanks for that Adrian. You are right I should use new ones. I think the poor state of the brakes when I took them apart (all that white powder) was in fact due to the seals leaking (because of crap pistons) and depositing brake fluid all around.

Sound advice. Requesting prices tonight.

Greetings

[londonboards]

Steve - I priced in Dollars to our US friends would get the price.

I actually live withing 500 metres of Robinsons Suzuki. Problem is their prices are so high. I have often found it cheaper to source parts from the US - even with extra postage charges. The new brake pistons I have in stock came from Canada.

Greetings

[Agemax]

i would NOT use the pistons shown in that pic. they will soon tear up the seals and cause problems. if yours look like that Richard, replace them!

[steveb922]

I think there's a difference between some surface rust and the sort of pitting shown in your photos. Personally, I would play safe and fit new. Quite apart from the safety aspect, it may save you having to strip the caliper again after a short time.

I notice you priced the last set in dollars - is there no UK supplier you could use?