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Project Another Track Bike

Discussion in 'Your 250cc Projects' started by kiffsta, Aug 9, 2017.

  1. kiffsta

    kiffsta Senior Member

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    @Frankster planted the seed that I should build up a trackbike to help promote my business plus it gives me an excuse to get back out on the track, so yesterday I picked up a very sorry looking MC22 for $180.00

    IMG_1416.JPG

    She is very low on compression so I will fit a spare engine that I have here, then build her up like my last one.

    Just made my first purchase to @maelstrom for a seal kit and scored some cheap coerce rear sets on ebay.

    coerce.jpg

    Does anyone have a spare seat ? Mine is pretty chewed up
     
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  2. jmw76

    jmw76 Well-Known Member

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    Hey.
    Looks like a good start to me.
    $180 beats the $500 I paid for the basis of my track machine.
    Still not fully sorted yet though.

    Peter.
     
  3. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Hey Chris. I was looking to replace my seat with a thin form to lose some weight. I've seen lots of track bikes with them.

    Form seat.jpg
     
  4. kiffsta

    kiffsta Senior Member

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    The issue is that the race glass supplied by teamtiger or BSpoke use the stock seat and mountings, I am yet to find cost effective raceglass for a MC22 that can have a seat like that.
     
  5. A.C

    A.C Well-Known Member

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    Nice score. If anyone knows someone who does fibreglass mould making, I'd be happy to let the track ducktail I have get copied. Just have to fill in a few sections first.
    663654.jpg

    653544.jpg
     
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  6. kiffsta

    kiffsta Senior Member

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    @A.C. they are awesome, alas I don't know anyone who does fibreglassing

    Some progress has been made on the old girl, alas the engine that came with it has no compression, and the spare motor I have been hording for a while has very low compression on 3 pots and none on one. :( , but that is okay.

    IMG_1444.JPG

    I have a MC19 engine which I may use instead. Or will keep an eye for a crashed MC22 that has a good engine.

    It appears this bike lived outside for a few years, even after having it a week, I am still seeing ants come out of every orifice.
    IMG_1443.JPG

    I have bought a few bits and bobs for it including head stem bearings , control cables, sprockets, chain etc , I will pick up some fork seals later this week so I can get it back to a roller. The H bar was bent and badly corroded, I gave it a quick blast, straightened it as best I could and painted it. Triple tree ready for new bearings as well.

    IMG_1428.JPG
    IMG_1429.JPG
    IMG_1427.JPG
     
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  7. kiffsta

    kiffsta Senior Member

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    gave the forks a once over in the Wet Blaster as I was doing some parts for an old Honda Scrambler and figured might as well do it all at once, now just waiting for seals to arrive then they can be rebuilt.

    IMG_7269.JPG IMG_7270.JPG IMG_7271.JPG IMG_7272.JPG IMG_7273.JPG IMG_7274.JPG
     
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  8. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    They look new. That blaster is unreal. Those engines might just have stuck rings.
     
  9. KICKERMAN360

    KICKERMAN360 Well-Known Member

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    I've always thought getting Honda RS250 race glass on an MC22 would be a cool project.
     
  10. ShaneP

    ShaneP Well-Known Member

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    My Bike:
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    Fibreglassing is not that hard, even I can do it. I've down molds and parts before, pva spray for separation, extra pieces for edges. Just need a few things like polish wax, modelling clay or plasticine, gel coat, pva spray, fine glass and regular glass matting, and you standard resin and catalyst. Paint brush, plastic container and a fibreglassing roller are also needed; don't wash your brushes, buy cheap ones and throw them out. I made a roller out of threaded rod and wire, too.
     
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  11. kiffsta

    kiffsta Senior Member

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    Forks seals done with 10w oil, while they were apart, I clear coated the fork legs , I would like some new Racetech springs but these may have to wait.

    IMG_1532.JPG

    Next stop is to fit my new Bridgestone s10R tyres and get her back to a roller.

    rs10.PNG
     
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  12. kiffsta

    kiffsta Senior Member

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    She is a roller :thumb_ups:

    IMG_1535.JPG IMG_1537.JPG IMG_1539.JPG
     
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  13. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Looking good.:thumb_ups:
     
  14. kiffsta

    kiffsta Senior Member

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    Decided it was strange that 2 engines had bugger all compression so I pulled my comp gaiges apart and reassembled them, did a comp test and it jumped from 0 to 175. 75 . 70. 150.

    Pulled the leak down tester out and it showed it was losing pressure out the exhaust valves.
    IMG_1784.JPG
    IMG_1786.JPG

    Whipped the head off and was pleased to see that the cylinders and barrels weren't too bad
    IMG_1791.JPG

    Popped the head into the wet blaster and spent ages cleaning up the valves then lapped them using some paste , need to find out what @Murdo used to confirm a good seal.

    Almost ready to reassemble , but I have hit a snag, I don't have the tool to fit my new valve stem seals , any ideas ?

    IMG_1793.JPG
     
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  15. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Chris,

    Use valve blue to test seal is solid. It's a liquid that when squashed should confirm a good seal. Should be something online to show you how.

    Valve stem tool is all I know. I'm guessing @Murdo will have a workaround.
     
  16. kiffsta

    kiffsta Senior Member

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    Can you post of pic of your valve stem seal tool?
     
  17. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    You have all the valves back in yeah? When I did stem seals on the fizzer head, I had the valves out. Pulled off the old ones, cleaned up where they sit, push new ones on by hand. Didn't have a problem at all.
     
  18. kiffsta

    kiffsta Senior Member

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    No valves are all still out, I just slipped them for contrast in the photo.
     
  19. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    To confirm the seats I used bearing blue (sometimes called engineers blue) and did one rotation with it on the face of the valves. This will show and high or low spots where the valves are not touching, and show you how wide the seats are and if they need grinding to restore to correct width.
    ZZR250 head 003.JPG
    This is the tool I made to fit the seals.
    ZZR250 head 010.JPG
    ZZR250 head 012.JPG
    Hope this helps.
     
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  20. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Something like this Chris. It holds the seal while you knock it in.

    https://www.motionpro.com/product/08-0510

    Also, this vid shows lapping and using engineers blue to achieve a good seal.

     
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