Yamaha

HELLO Is a TY250 twinshock engine the same as a DT250 engine, if not what is the difference? So if not, what other bikes have the same engine as the TY or a engine that will fit (different cc etc) thanks Owen

Someone told me you could get a boost bottle for a yam 175 that goes between the carb and reed valve which gives it some more oomph is this true? and if so where can i get one from and are they any good and how hard are they to fit? cheers

This is my plug after one section this past Sunday (and yes I cleared that one). Sorry about the picture - it's hard to get a close up picture, should have used a tripod. The bike is a TY250A, running 110 octane leaded gas, Bel Ray Synthetic mix oil. Any idea what caused this and second how can I avoid it in the future. By the way, I probably have at least 100 hours on this bike with no problems. Changed the plug and it fired up first kick. Thanks in advance. Alan

Hi, Iv'e started restoring a Yamaha ty175 1976, this is my first bike and my first restoration project. I'm trying to restore it to its original looks to then bring to classic motorcycle shows. When starting it in the past it has kicked back at me and smashed the cluch/crankcase cover. I have repainted it and now starting to rebuild it but finding it hard to come across parts in my price range will a Yamaha DT175 kickstart and crankcase cover fit my Yamaha TY175. I will try and post some pictures of it on its way to a compleded TY! thanks,

http://blogs.yahoo.co.jp/himekami7788/3251275.html

Hello everyone, I have just bought a ty250 mono shock and wondered if any one could help me identify the year of manufacture? I have engine and frame numbered(which match)if these will help id it. Thanks in advance Chunky

Hi Everyone I am in the process of converting a TY 250 frame to Majesty spec, does anyone know what the rear shock length is or did they use the original shock? Regards Andy

Hi all, Does anyone know of any useful mods that can be made to my mono to help it to stop. The bike is great for most things but the drum brakes can be a handful. I want to keep the bike original so wont put discs on. I usually clean the brakes out after 3-4 rides and rough up the pads/drums. Cheers

I really need some help with my TY175 it started knocking a while ago so i had the top end off and fitted new little end gudgeon pin and piston rings, this made no difference what so ever !! So I sent it away for a rebore and crank build which was done with a NOS Hepolite piston with dykes rings as it should be and a new conrod and all the bearings when i got it back together it still knock as bad as before maybe a little worse !! can anyone give me a clue as to what to look for ? And please dont say they all do that cos they dont and this one never used to I was a a comp today with a guy whose TY was silent

Hello all ,i have a ty 250 (74) and i am having trouble finding a fuel tank . So i was looking around on ebay and saw some dt tanks that look identical , size shape , mounting etc.. ! has anyone ever seen one or done this before ? Im sure the ty175 tank will work but they are rare here as well , will the ty 80 tank fit ?? thaks any help appreciated ! CJ

Hi TY Gurus I have a TY175 circa 1976 - mines great except knackered wheels (spokes missing, rims pitted, hubs look corroded, remaining spokes rusty). I have just acquired a TY250 also circa 1976. It's wheels are in brilliant condition - clean, straight and very recent new spokes Can I straight swap them so the good wheels are on the TY175? I cannot see any difference but thought I'd ask first? Even the hubs look identical? I'll probably swap the forks/yokes as well - I've read on here that the 250 forks are more suited to heavier riders (I'm over 100kg) - any advice appreciated. Are the rear shocks a straight swap as well? Anyone know standard length for TY175 and T…

Hi all, I haven't really ridden for 20 or so years (I used to do heaps of trail bike riding 20+ years ago on my old trail bike, usually more trials (rough) type trail riding rather than enduro (fast) type trail riding) and looking at buying a TY175 or TY250 (or maybe other twin shocker, KT250, RL250 etc) to ride casual trials/comp twinshock trials but would like to also to poke around doing some general trail riding exploring etc. My feeling is that the 175 would make a better competitive trials bike but the 250 would be better as a combination trials and trail bike. What about the RL250? What are your thoughts? If its relevant I'm about 5 foot 7 and 78 kgs.

For those who need a manual for their TY175 I have copied mine and saved it as a PDF. You can download it here.

How do i remove / dismantle the fork legs on a TY250 mono? I seem to remember a while back that there was a special tool required to go down the inside of the tube to lock it then you can undoo the bolt that goes up through the bottom of the slider. Be damned if i can find it though. Anybody have any details.

Any wisdom from the Northern Hemisphere?? Click on this one: http://www.trials.com.au/forum/viewtopic.php?f=16&t=7408

Hi there, Will a Mikuni VM26 mm carb fit my 1977 TY250? Just picked up a very nice low hour bike (318 miles on working speedo). The original Yamaha carb has some wear around the float area. If the Mikuni fits can anybody please give me an idea of correct jetting specs? Thank you for your help Paul

Hello All, I bought a TY250 some time ago as a non runner and over a few months have got it up to reasonable scratch mechanically and have even wobbled around a couple of twinshock trials on it. I have come across a problem that I can

Hello all I'm looking for any info on the OW10 that mick rode in 74,75,76. I would like to build one. Wonding if the Dt. was a base for it or was the Dt based on it? Thanks

I bought a ty 250 mono today and am trying to work out what year it is, and someone has been modifying the cylinder i'll post a few pics let me know whats been done and why??