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Discussion in 'The Garage' started by Chris1648, May 1, 2019.

  1. Drill it apply some heat to loosen the bolt and it should come out. Those are not torqued high'
    If you need parts hit me up always have motor parts DADDYGCYCLES@YAHOO.COM
    I have two sets of matching heads sitting here now
    WELCOME to the Site!
  2. Paul Sutton

    Paul Sutton Buckhorn Gang Member Top Contributor

    Getting the drill accurate from the start is key. So easy for the drill to drift off and bugger the thread on one side. It is worth spending the time to securely clamp the cover to a pillar drill so you can get better drill allignment. Should you mess it up there are ways to salvage the job. Perhaps I am imagining it but I thought I had seen a jig thing available to keep a drill vertical/centrally alligned when doing this sort of work, or drilling for helicoil?? Would be a simple lathe project to make.
  3. Chris1648

    Chris1648 XS650 Enthusiast

    Can anyone tell me an easy way to remove the valve springs.
  4. 5twins

    5twins XS650 Guru Top Contributor

    Paul Sutton likes this.
  5. Paul Sutton

    Paul Sutton Buckhorn Gang Member Top Contributor

    The easy way is to use a valve compressor and they are fairly cheap. The reason I say it is the easy way is because it keeps everything aligned on the same axis which makes life easy when you try to re-insert the collet halves. The job can be done by pushing with a piece of wood but it is very fiddly and requires another person to place the collet halves. The reason to use wood is because if you slip pushing with metal you may break something or someone. Buy the compressor or use a G-Clamp like 5twin suggests.

    I bought the valve compression set that 5twins has provided a link too above. It is very good quality but there is a minor issue. The largest size it fits is 30mm whereas the XS is 32mm. You can still use the 30mm on the XS but you must be careful it does not slip off. My solution was to make a small 30 to 32mm adapter on my lathe. The adapter is essentially a washer 7mm thick and bored to 31mm one side and 33mm the other with both 2mm deep(extra 1mm diameter gives a comfortable fit):
    The 33mm side sits on the valve spring/washer and the 30mm compression adapter fits into the 31mm side of the washer. When you compress the spring it is handy to have a magnetic pickup tool to grab the two parts of the collet - also handy for getting them back in place.

    Attached Files:

    GLJ likes this.
  6. Chris1648

    Chris1648 XS650 Enthusiast

    Cheapest place to get a cam chain?
  7. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    Paul Sutton likes this.
  8. Paul Sutton

    Paul Sutton Buckhorn Gang Member Top Contributor

    Cam chains are special and take quite a load. If they fail then the repair cost can be enormous. $40 sounds reasonable and similar to UK prices. I went DID and was happy with it. Is DID recommended in the US?

    Next question: Do you buy an endless version or one with a link? The answer probably depends on how far you plan to strip the engine down, but even so I would go for the chain with a joining link rather than an endless.
    Jim likes this.
  9. Chris1648

    Chris1648 XS650 Enthusiast

    F558B86E-5DB3-4568-9642-77BA8119E76E.jpeg 3ACA1F7F-D526-4BD9-B88E-ED7688514ED3.jpeg D2EE16E7-D2E8-4F46-BCF6-7A45E5DABE05.jpeg
    Well the good news is I found the knocking sound.
    Paul Sutton, TwoManyXS1Bs and Jim like this.
  10. Chris1648

    Chris1648 XS650 Enthusiast

    where can I get a cam chain guide for a 1979 xs650sf? nobody seems to have one for this specific model. will just any year work?
  11. XSLeo

    XSLeo XS650 Guru Top Contributor

    From 74 up they are the same. Some of the earlier models were different.
    The early tensioner had a toothed sprocket that ran against the cam chain. This required a different front guide, Clearance issue.
    The stock cam chains if kept properly tensioned and oil kept changed it should last at least a 20-30 years.
    As you found the plastic part came off the aluminum backer. This is believed to be more from age than miles. The glue they used is simply giving up.
    On a new guide you might find a new one. It seems I remember someone saying Yamaha had another run made.
  12. Chris1648

    Chris1648 XS650 Enthusiast

    Yeah it’s 40 years old. 22,000 miles I had a hunch that was what the sound was after reading a few of the build threads on here. Thanks for the info
    Paul Sutton likes this.
  13. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    If Yamaha made another run, it hasn't hit all the popular suppliers yet. They're all showing unavailable.
    Mikes XS has repop guides that some people have used with good results. I didn't like that the holes were drilled incorrectly (although apparently it still works).
    Here's a how-to I wrote to make an XS guide from an SR500 guide.
  14. Chris1648

    Chris1648 XS650 Enthusiast

    XSLeo say any year will be the same. Is that not correct?
  15. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    He said from 74 up. Sounds right. I'll take his word for it. Why?
    Paul Sutton likes this.
  16. gggGary

    gggGary Stop that! Top Contributor XS650.com Supporter

    Yup, all the same 74 up, Yamaha did a run of the guides about 3? years ago, or found some somewhere. But now they have stopped. much as quality control seems sketchy on the mikes guides, there are a lot in use and we aren't hearing about any failures...

    This Yamaha 256-12231-01-00 GUIDE, STOPPER 1
    Not Available, fits the following models and components:

    Yamaha Motorcycle 1972 XS2 CAM SHAFT - CHAIN TENSIONER

    Yamaha Motorcycle 1970 XS1 CAM SHAFT - CHAIN TENSIONER

    Yamaha Motorcycle 1971 XS1B CAM SHAFT - CHAIN TENSIONER

    Yamaha Motorcycle 1973 TX650 CAM SHAFT - CHAIN TENSIONER

    Take these with a grain of salt the Partzilla parts fiches are not infallible.
    Yamaha Motorcycle 1980 XS650G Camshaft & Chain

    Yamaha Motorcycle 1983 XS650SK Camshaft & Chain

    Yamaha Motorcycle 1982 XS650SJ Camshaft & Chain

    Yamaha Motorcycle 1981 XS650H Camshaft & Chain

    Yamaha Motorcycle 1981 XS650SH Camshaft & Chain

    Yamaha Motorcycle 1977 XS650D CAMSHAFT - CHAIN TENSIONER XS650D - E - E006501- -

    Yamaha Motorcycle 1974 TX650A CAMSHAFT CHAIN TENSIONER TX650A - XS650B

    Yamaha Motorcycle 1975 XS650B CAMSHAFT CHAIN TENSIONER TX650A - XS650B

    Yamaha Motorcycle 1976 XS650C CAMSHAFT CHAIN TENSIONER XS650C

    Yamaha Motorcycle 1977 XS650D CAMSHAFT CHAIN TENSIONER XS650D E E006501- F

    Yamaha Motorcycle 1979 XS650_2F CAMSHAFT-CHAIN TENSIONER

    Yamaha Motorcycle 1980 XS650SG CAMSHAFT-CHAIN TENSIONER

    Yamaha Motorcycle 1978 XS650SE-11 CAMSHAFT-CHAIN TENSIONER

    Yamaha Motorcycle 1978 XS650SE CAMSHAFT-CHAIN TENSIONER

    Yamaha Motorcycle 1979 XS650SF CAMSHAFT-CHAIN TENSIONER
    Last edited: May 5, 2019
    Paul Sutton and Jim like this.
  17. 650Skull

    650Skull Dinosaur Lives Top Contributor

    Mr few words...........asking members if other members answers are right.........????........

    XSleo knows a lot and has been around on xs650 forums a lot longer than this one has been going.................might not get much more help from him much longer.

    If your not sure about answers do some research........ here is a list of manuals that can be downloaded and you can cross reference information with answers.
    Paul Sutton and WBacon like this.
  18. Chris1648

    Chris1648 XS650 Enthusiast

  19. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    No worries. :) I think you just misread my first comment....
    gggGary likes this.

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