Messages

one thing to watch out for with needle shims, when they are installed make sure the needle can still wiggle a bit freely. if not, you can wear out a jet tube or needle very fast. .02

Definitely! I did check for a little play. All is good over here!

Economycycle has them for a buck a piece. As SoCal250 mentioned, they're 0.5mm in thickness. I just put some in the other day, so my needles are at position 2.5 now.

Not mine. Thought this might be of interest to someone.
https://sfbay.craigslist.org/eby/mcy/d/hayward-1985-yamaha-rz350-kenny-roberts/7669907196.html

... Also what would you expect as features that are 2t specific at such an event?

Make lots of smoke!

on my r5, i rebuilt the pump and used an rz lower part of the body, and yes, it had 1 pin, no spring.

if you don't plan on using the priming wheel there's no need for the clutching mechanism. even yamaha stopped putting them on pumps ;)

My bike is a 1977 RD400D- there is no priming wheel. That explains that.

Personally, I'm not worried about it. From what I could tell, the pump had been untouched- that's the way it came and it was working fine. It's all back together just like I found it, albeit new seals, etc., and it's working flawlessly!

I did mine last month. My pump only had one spring. 

There are supposed to be two sets of spring & pin, located directly apposite each other on the outside of the distributor and captured by the ID of the worm wheel. Each pin is about 1/2 the size of a piece of long grain rice.

Yes, you described the single pin that I have. I had to search the internet to make sure that I wasn't crazy, since I couldn't find the spring and pin anywhere I was working. I even used a plastic bag. I carefully inspected the wear marks on my parts- only one side was used. I did finally find confirmation that not all pumps have 2 springs.

Brian Turfrey of Yamaha MotoGP 500 fame is still making custom pipes. He built pipes for Lawson and Rainey, then later for Team Kenny Roberts. I just got these a couple of months ago. He's out in the Modesto, CA area.

I did mine last month. My pump only had one spring. 

I've never seen this before either. Awesome point of view! and the sound!

Don't do it!!

He figured it out. He posted on Facebook too. Turns out he was trying to force in the wrong seal.

Nice work! Very impressive! 

I don't know if this is allowed, since this is a Craigslist/eBay watch, but this just popped up in Facebook Marketplace. Seems to be all there in pretty nice condition!
https://www.facebook.com/marketplace/item/275720528491039/?ref=messenger_share

I purchased a seat that is similar to what you want. My solution was to braze pins to the frame and pin the pan in place. I cut the pins down to size and suspended the seat with rubber stoppers.