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I used the local bearing supplier, matched the id to the pins, then used reamers to enlarge the bearing carrier parts... From 17mm to 22mm from memory.
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Replaced all my bushes with sealed needle rollers.... Big difference.
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Similar thing happened to me, the piston had partially siezed and smeared alloy across the rings, jamming them into the grooves, causing just enough loss of compression to make starting a problem. Snap-on and Mac tools make an endoscope tool, see if a local garage will have a look down the plug hole for damage to confirm. Then convert it to 300!.
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My fuel pump failed at 100 hours. If you search for Tmax or YZ250/450 fuel pump on eBay, they are £30. I'd replace it now. Also, when you reassemble the fuel couplings, lock wire them to prevent uncoupling. It'll save you the heartache of an engine removal.
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The same pump is used on lots of Yamaha's. £29 on eBay. Look for YZF250/450 pumps, item no 111448383854.
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Another useful tip.... My fuel pump has packed up after 185hrs use, took it apart, and the armature bushes have worn out. Bit of research revealed, the pump is used on a lot of bikes, mainly Yamaha YZF models. Available on eBay from £28.75. Works perfectly.
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Google 'Evans waterless coolant' a chemical alternative to using water. It has a much higher boiling point, and does not pressurize the coolant system at all..... the fan can be on and you can remove the rad cap!
Works well in our Ossa's.
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We have fitted heated grips to our Ossa's.... very very effective, no more cold hands! See trialsandendurodirect.com, £34.00.
Bought 3 sets of these from ebay though.....http://www.ebay.co.uk/itm/390526773152?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 better in my opinion as they are just full on or off.... and just £5.80 a set! Work a treat on our three road bikes.
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I have this type of KX 250 case on my Gollner KT, & it will fit no problem, without modifying anything other than the clutch cable. The best cover you can use is the KX420, as the clutch actuating arm is on the top of the case, and not the front, a common mod back in the day.
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I don't own an Ossa.... and my post is not personal, I'm not making it up either (although you could be forgiven if you thought I had), just an accurate observation. I don't have posting tourette's, and only post when I smell needless, wind people up, b...sh.t. You just cant argue with a 2 year warranty on a brand new design. Anyway, why is HAM2 a girl on your avatar? Or is that personal?
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Alex Gas Gas ... Dabster... Gas Gas... Alex... Montesa... Dabster ...Montesa... Alex... Sherco ... Dabster ...Sherco ... Alex ...Beta ... Dabster ...Beta... I'd love Alex to get a great deal on a Factory Ossa.......
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atf fluid works just fine in this old girl!
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That'll be the Longmynd in August... the last trial I rode before last weekend! ( I remember ya... I floundered on the 3rd lap) Top event, fantastic scenery... cost me a rear mudguard though! And they are completely un-obtainable now...
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I've got a full set of gollner yellow tank and side panels etc.... it's a bit too 'in ya face'! \
What section number did you observe Marky? Thats the first multi lap I've ridden for 5 years, really enjoyed it.
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''The secondary reason for not using TLS front brakes on a trials bike is that they work very poorly going backwards.''
Excellent!!! Cant add any more to those wise words!
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YZ490J brake came from '82. I would've loved a brake that worked as well on my '81 Bultaco 325 back then. Somebody must've run one on a trial bike in those days. The 300 Fantic brake with the floating cam work well though.
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The spec is '75 donor bike that had 1 owner from new, and had only covered 1000mls!, 1 Gollner framed bike age unknown (thanks Danny!), both stripped and put back together after the Gollner frame was & given modern steering geometry, the rear shock mounts moved (thanks Blissy!), footrests lowered (thanks Wiggy!), alloy falcons, TY mono front forks, YZ490 twin leading shoe front brake (why didn't we do this back in the day? The closest to a disc's power a drum will ever get!) tubeless rims, Talon sprockets, stainless spokes, top yoke bar mounts milled off and welded forward, PWK28 carb, BJ Racing 305cc big bore kit (sold as a power up kit back in the day), Gollner heavy flywheel, Birkett modded port timing, exhaust and reed valve conversion, engine set up by the same (top job! Nearly as good as his works engine in the Suzuki 325) Countless lightweight fixing's, making it lighter than my old Fantic 340 special, and countless hours fettling and fine tuning. I've enjoyed every moment of it's build. It's very powerful, has superb rear suspension, and is a pleasure to ride... which I will try to do much more often! Rode in S. Shrop's club champ last weekend, and THREE KT's were in attendance! Great to see them being ridden more often. I'll take some pics and post when time allows.
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The front brake plate is very prone to cracking, has happened to me as well, Nigel Birkett sells a replacement/upgrade, totally different to the std item, much stronger, and gives a better brake. I have a spare one that I will list on fleabay shortly if thats any help?
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not sure if this is how you post pics! Here's mine.
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mmmm.... 27 guys on C90's?! Let me know if you get a group like that again, we'll pop down to swell the numbers. Any trick C90's? Couple of the lads have big pit bike engines fitted.... power wheelies!
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Hi, we have the same trouble! 5 of us going to le mans on C90's in april, using green lanes etc. The only place I've found is on e bay, a guy in Scotland selling kings branded trials type for
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Hi Woody, does this mean you'll be buying a KT? Or have you hoovered one up already.... will dust off my gollner special and ride around the classics with ya if thats the case.
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I'm staying slap bang in the middle of NYC, next to central park...... as to long hours travelling Brian, most nationals in UK need similar travel times..... Scotland is an easy 8 hours, it's just part of our sport!! All I wanted to know is there anything to do with trials in NYC. If YOU wanted to know of any trials related shops in the uk, I can tell you from memory where and how to get to them.... not how silly you are not knowing the geography etc....
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Hi guys, I'm in New York June time with the missus, and once she's dragged me around all the shops and sights, I will need some kind of Trials bike fix! can you advise of any off rd shops in the city or nearby..... thanks.
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Lee, I,ve a set of section forks that could go onto my 240/307 hybrid. What problems did you encounter on the install?
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