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Post by strick on Mar 27, 2008 23:17:57 GMT -5
I read a post in the for sale forum making reference to an extra exhaust valve oil line. This is the valve that stuck in my motor, which gets bored and valve guides put in tomorrow. Does this extra oil line provide protection against suc a failure.
Please fill me in on this!
Thanks guys, sorry to be a pain with all my questions, but I am new to the SR500. If you have any classic Chevy question, KTM or 4-stroke racing dirt bike questions though, I might just be your man!
Thanks again for all the help!
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Post by davewfc603 on Mar 27, 2008 23:35:04 GMT -5
You can get the oil line for the exhaust at Thumperstuff, the factory set up leaves the exhaust valves with too little oil & too much heat. It is item #1102 on his part list. Mark is a good guy to talk to for questions, know the sr Dave
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Post by strick on Mar 27, 2008 23:39:48 GMT -5
Thanks, I just rec'd $300 worth of top end parts (complete rebuild) from Mark @ Thumperstuff. I wish he would have told me about this line.
Is it a pretty straight forward install?
Thanks!
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Post by StewRoss on Mar 27, 2008 23:44:00 GMT -5
Hi, There are a variety of these lines plus one from the manufacturer...simple to fit but you have to remember to block off the original oil port to the back of the head, unless you use it. Yamaha looked at it years ago and saw that there were many people changing the lines around...so in the end they did it too. SR  |
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Post by chew652 on Mar 28, 2008 7:42:17 GMT -5
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Post by strick on Mar 28, 2008 9:49:56 GMT -5
Chew - how is this accomplished? Stew mentions to block off the original oil port. Could one of you explain this? My head and cylinder are getting guides and bored today, so I can't use a point of reference.
Thanks!
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Post by bigshingle on Mar 28, 2008 10:36:19 GMT -5
With the Thumperstuff line you shouldn't have to block off anything — just install it.
(I say this without having done it. I have one but haven't put it on yet.)
There is was a pretty good thread on this awhile back.
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Post by bigshingle on Mar 28, 2008 10:40:33 GMT -5
Look at page five, "Oil Line Kit?"
There have been some other good threads here too.
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Post by chew652 on Mar 28, 2008 11:13:15 GMT -5
Chew - how is this accomplished? Stew mentions to block off the original oil port. Could one of you explain this? My head and cylinder are getting guides and bored today, so I can't use a point of reference. Thanks! The intake rocker shaft has a threaded hole that the banjo bolt fits into. You have to remove this bolt and replace it with the solid bolt from the exhaust side and then put the threaded bolt on the exhaust side and attach the line. If you are putting the double feed line on then it should be supplied with a second internally threaded bolt and banjo bolt .It is pretty self evident when you see all the parts.No machining or special parts needed.IIRC the rocker shaft retaining bolts are aluminum so go easy. I think Stew wants to make sure you don't get a new exhaust only rocker lube kit and then not plug up the intake rocker shaft. If I am not correct I'm sure someone will set us both straight. I just had the head off a few months ago to do the camchain and put in Porsche valve adjust screws . |
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Post by StewRoss on Mar 28, 2008 17:12:53 GMT -5
Here are a couple of pics to illustrate what I am talking about. Here is the head with the inlet rocker port open, it's the one at the rear right of the head, facing rearward:  ...and the other side with the head fitted and the genuine Yamaha oil line now fitted to the exhaust rocker pivot hole...  If you look at the top of the engine in this pic you can see a shortened bolt and a copper washer sealing off the old oil port where in the top pic it is open...  One one of my engines I have used both oil lines...it hasn't adversely affected anything to do this...  ...here's a pic of one of Carl's engines in a dirt bike, complete with a single, dual exhaust/inlet oil line...  As you can see there are a variety of ideas all that work. Hope this explains it better for you. SR |
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Post by strick on Mar 28, 2008 21:23:06 GMT -5
Thanks - how do you get a cylinder & fins to look like that? Is it buffed, painted, powdercoated..............?
Thanks!
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Post by StewRoss on Mar 29, 2008 1:29:15 GMT -5
The cylinder and head were wet bead blasted...cheap and looks great. If you do it make sure that you really wash the castings well to remove all of the excess beads. This is how it came back from the blasters. You can still see how I had it all masked up and plugged...and all of the excess beads everywhere:  SR  |
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Post by caferacercarl on Apr 1, 2008 3:19:44 GMT -5
I recognize that newly finished motor, won't be long now and another lovely SR rolls out of SR's shed !!!bring on the piccy's and make us all cry, pitty you can't make the KVR stew, it would have been great to catch up in person, I hope to have the Deus bike finished for the event, had the cases head and rocker cover done at Hydroblast and they came up a treat, photo's soon. regards Carl.
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jeffz
Full Member
Posts: 215
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Post by jeffz on Apr 15, 2008 17:03:50 GMT -5
Stew- In the last pic of the post explaining the oil-line modification, there is that blue anodized Banjo Tee. I've searched the internet for one of those with no luck. Any clue where I could get my hands on one?
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Post by StewRoss on Apr 15, 2008 17:44:10 GMT -5
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