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Project Yamaha R1-Z 250 YPVS in England

Discussion in 'Your 250cc Projects' started by Alfiestorm, Feb 13, 2021.

  1. Alfiestorm

    Alfiestorm Member

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    My Bike:
    Yamaha R1-Z 250 YPVS 1990, Suzuki GSXR1100L 1990
    The bike was a sales disaster in the UK, under powered vibrator which looked ok.
    It used the Belgarda frame and Paioli forks and many of the SZR's in the uk have been cannibalised for the frames and running gear for people who have put 500cc two stroke engines into them to make 500cc replica race machines, those machines not only look awesome they go like crazy round the tracks and some have put them on the road too.
    Will get some fork measurements at the weekend.
     
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  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    From reading I did, it's a modified TZR250 frame - that would make a fantastic basis for a race bike...
     
  3. Andych

    Andych Moderator Staff Member Premium Member Contributing Member

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    41mm USD forks I believe... Interesting concept... big single lungers were loved early on by the UK racing fanatics but mostly based around older engines... The Yamy was probably a bit stangled.
     
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  4. Alfiestorm

    Alfiestorm Member

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    My Bike:
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    Some more info, the forks are made by Paoli Italy, The wheels are by Brembo Italy, Brakes are Brembo, rear shock marzocchi. The bike was built by Yamaha Italy Uses the Belgarda frame and swingarm as used on the TZR125 4DL. Lots of good quality running gear on the SZR so well worth getting hold of one just for the parts, if you can find one that is as they were only made for two or three years, The rest of the SZR parts can be sold off to spares hungry followers of the SZR. The frame and swingarm plus the body work off of the one I bought for spares went to guy who is building a track bike using a RD500 motor. I got half my money back on those parts alone.
     
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  5. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    After your other message I did do some research - seems they are extremely rare here which is a real shame as I'd love a pair of those wheels...
     
  6. Alfiestorm

    Alfiestorm Member

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    My Bike:
    Yamaha R1-Z 250 YPVS 1990, Suzuki GSXR1100L 1990
    Handle bar arrangement has changed from the ace bar or clubman bars idea depending how old you are after a mock up. It just did not suite the bike.
    So i have a pair of SRAD 750 clip-ons on the way after being sent the wrong ones first time round. They have a one inch rise so maybe the perfect bars maybe.
    Meantime I now have matching wheels, I was going to take the rim tape off the front wheel but then found out it is lacquered over so had to fit the other SZR rear wheel.
    Gold chain guard.jpg Wheels and stripes.jpg Fitted my original power RS tyres. Painted the chain guard gold to match the gold highlights on the forks and bottom yoke.
     
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  7. Alfiestorm

    Alfiestorm Member

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    My Bike:
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    The conversion is now complete, The front mudguard fender will be painted black when the weather warms up here in England.


    261621258_223544076573440_17300672932485610_n.jpg 261652077_223511999909981_5799389954802768182_n.jpg 261666357_223512059909975_1707907607223816321_n.jpg 262211417_223543973240117_3070741521880708375_n.jpg
     
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  8. Alfiestorm

    Alfiestorm Member

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    My Bike:
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    Went out for a test ride yesterday and it all works very well.The front brakes are fantastic and my only criticism is there is not enough lever travel for my liking which I will sort out. A few adjustments needed to re-route throttle cable as the revs rise a bit when the bars are turned full lock to the right, as well as the mudguard going black when the weather warms up the brake calipers will also be painted black.
    261076895_288614943184448_4266358474968746083_n.jpg 262063793_340259777905324_7604030597464877756_n.jpg
     
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  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Check the size of the master cylinder. If too large it will give a hard feel which you can remedy by going down in size by 1mm.
     
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  10. Alfiestorm

    Alfiestorm Member

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    Thanks for the reply. Currently using a master cylinder from a Suzuki Bandit 650 which has 5/8 marking on it, do you know what should I be looking for ?
     
  11. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Well that should be okay. Standard Ducati size for those calipers is 16mm.
     
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  12. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    If the levers are aftermarket, or aftermarket OEM copies, sometimes they can be poorly made and not give adequate free play. You can correct this by filing down / sanding / grinding the nub that pushes the master cylinder piston in, until you achieve adequate free play. Otherwise, a quality set of aftermarket levers for the donor brake/clutch perches.
     
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