Ok another question, Mostly if there are any tricks tips to this and we are talking bout those little wee springs and Little cylinder things those little tiny so and so's in the oil pump.
Any tricks on doing them, I have done them in the past but honestly I was always drunk when I did it and dont really remember, I do know I glued the tabs to the springs and this made it spring and tab as one unit, I'm doing that now but I thought I would post on here incase someone has a good trick to do this. Thanks Karl
Quote from: Karl squire on September 20, 2023, 10:43:51 AMOk another question, Mostly if there are any tricks tips to this and we are talking bout those little wee springs and Little cylinder things those little tiny so and so's in the oil pump.
Any tricks on doing them, I have done them in the past but honestly I was always drunk when I did it and dont really remember, I do know I glued the tabs to the springs and this made it spring and tab as one unit, I'm doing that now but I thought I would post on here incase someone has a good trick to do this. Thanks Karl
I got it done.
It's recommended you do it in a plastic bag so they don't go shooting across the shop into oblivion. But the last few times I've done it I hung an old bed sheet around my workbench to make a curtain barrier. I just hold the two pins into the distributor with the tips of my fingers and then gently (and patiently) try to slide the wheel over. Just make sure you've got the wheel oriented in the correct direction or you'll be taking it apart and doing it all over again.
EDIT: while I was writing my post it seems you got it figured out. :thumb:
I did mine last month. My pump only had one spring. :umm:
Quote from: svgarage on September 20, 2023, 07:21:40 PMI did mine last month. My pump only had one spring. :umm:
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.
Quote from: SoCal250 on September 20, 2023, 10:17:13 PMQuote from: svgarage on September 20, 2023, 07:21:40 PMI did mine last month. My pump only had one spring. :umm:
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.
last one i did i just used a solid pin that i cut out of stock. .02
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 heard, later pumps had no springs, ala. m in sc.
cliff
Quote from: SoCal250 on September 20, 2023, 12:51:31 PMIt's recommended you do it in a plastic bag so they don't go shooting across the shop into oblivion. But the last few times I've done it I hung an old bed sheet around my workbench to make a curtain barrier. I just hold the two pins into the distributor with the tips of my fingers and then gently (and patiently) try to slide the wheel over. Just make sure you've got the wheel oriented in the correct direction or you'll be taking it apart and doing it all over again.
EDIT: while I was writing my post it seems you got it figured out. :thumb:
Thank you.
Reference for those that have never seen how tiny. :eek:
(https://i.ibb.co/TKpyrkv/20230924-080223-1.jpg) (https://ibb.co/FsNpnKx)
Yes them little buggers, such a pain in the ass to install. Omg.
Quote from: m in sc on September 21, 2023, 02:24:38 PMlast one i did i just used a solid pin that i cut out of stock. .02
You can do that with out the springs, hmmm good to know.
Quote from: svgarage on September 21, 2023, 01:45:47 AMQuote from: SoCal250 on September 20, 2023, 10:17:13 PMQuote from: svgarage on September 20, 2023, 07:21:40 PMI did mine last month. My pump only had one spring. :umm:
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.
so everything was exactly the same as the 2 spring and pin system but it was only using one?
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 ;)
Quote from: m in sc on September 25, 2023, 11:35:04 AMon 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.
I was suspecting that the later pumps without the starter plate may not have 2 sets of springs and pins since those are used to disengage the pump from the worm drive for manual priming. Good to know. I haven't done a 400 pump yet, only 250, 350, R5, and CS5.
On a side note, if anyone is in need of replacement springs/pins Economy now sells them:
https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/engine-related/oil-pump/oil-pump-worm-gear-pins/
When you guys say 1 pin do you mean 1 pin goes all the way through the shaft to the other side so both sides engage the gear wheel? The 400 pumps I've tinkered with, that have the primer wheel, it's a blind hole on each side where the spring bottoms out and then the pin goes in.
1 pin 1 side
Its like gunsmithing with some of those tiny pins and springs and definitely a containment area of some kind (learned the hard way) always is a must.