Messages

me too, no link.

BlueR32

was great to catch up, thanks for calling in. its raining alright now!
i am currently selling two or three bikes to fund the next one. i will keep following yours, good luck with it.
might catch up with the brother for a spin sometime.
cheers
les.

socal250

what a shame you had to drill the lock, i thought that the whole yoke would have lifted up enough at the rear to allow the lock to disengage, wrong again!

cheers
les.

socal250,

that to me looks spot on angle wise, i measured 15mm center to center of the bolts. its a small allen key, a 5mm hole would give you wiggle room, but you could start smaller and see if you are on or not. in my estimation you should miss any internals of the fuel cap.

no need to change the lock if you get one of these!!!;-

https://www.ebay.co.uk/itm/334008279666?hash=item4dc471e272:g:gD0AAOSwP61gpx88&amdata=enc%3AAQAIAAAAwIfziARVmCh6O3xoEmsEryrfuwD9pJlRLFRcUESU1aAF5TtIbcC16Wcjg5AAq3Nen%2F4LTh38iAvclQeiqbrqS90u9WhyH4xX8TpMh3tR4EZ71dsfLpM%2BCvotNHS7RpmOM45TNHpe%2FmBn9LuWX3YTYr4IAGVnua1zk30V44rjFyXoEwQZhRvAOuwD3Dybkj%2BZo5YBPYVHolosVsd5%2BQxvSNc7cy4LXnPIuY%2Bu7cSS5sw8h%2FzMJb9iV%2Fa2Z4IIxPb46w%3D%3D%7Ctkp%3ABk9SR6zO39aiYg

let me know how it goes!
les.

Yup,  just checked on one of  mine. 45 degrees in and forward of the allen screw that is at about 4 or 5 oclock drill a 5mm hole 15mm away from said screw centre. that is, a hole thru the opening part of the fuel cap. the offending screw will be there (hopefully!).

les.

socal250,

guaging where that screw is in relation to the visible ones, i bet you could drill a hole just big enough to get an allen key thru there and have at it.

not much to lose!

cheers
les.

me again

here is a replica, in the 4th pic. you can see a small allen screw and the mounting hole is near the hinge part of the cap.

les.

https://www.ebay.co.uk/itm/184829670056?hash=item2b08b4f2a8:g:JrUAAOSwY09hgnuu&amdata=enc%3AAQAIAAAA4GZxeUeg07zF2BcCSUvu0zhabGwYeRvN1PCy77Pfz%2BGHScXZvkCrIxwdsLVUbYtv2hdVPBq4RX%2Bk7gfWzZQvUxnrB0qCMnHArNULZe06MkW50Bmz%2FhE702yygCnet0Rq6Sl2q6dLbg7XcCEysXwSm1q6YCsI6OsBcRhJY3E881EgkVDdy3Bb3zfgc5ddlaGhEYYnlBLoLOC8gjYmALM1xp4M7zu2bp2w7gEiBaPSZlNrU1dPwn61laZNCIYt7q4ZmlzM8UELINEWGvM5sQMokuLmjvRyhVEhdwmOx38mrT2O%7Ctkp%3ABFBM9Puvg6Ji

Socal250

working from memory of other similar yamaha strokers that have a very similar fuel cap, there is ONE small allen bolt under the locked part of the fuel cap! it screws into the dropped section of the opening near where the breather pipe exits.

i drilled the lock off of mine and bought a replica (very good one) from china on ebay, but of course you end up with non matching keys.

hope that helps
les.

it looks in great condition, shame about ypvs. there is a lot missing that needs to be got to convert it back. the wiring loom has the connectors to just plug and play, but you need the power valve servo motor, cables and pulley for the valve, plus the power valve control box. over here (ireland) they are hard to get now and expect 3 or 4 hundred euros for the lot, but totally worth it for the difference it makes.

cheers
les.

hi,

if it has a working power valve system fitted, they absolutely fly.
the oldest model (2rk/2rh) will make 29hp on a good day and is very light indeed.
mine never ceases to surprise me.

cheers
les.

there is no tuning done. i will order and try a new valve, wont hurt to have a standard size one anyway.

cheers
les.

M in sc,

very quick reply!

it is controlled by the standard yamaha set up (servo etc.) however i have the modified programmable power control box, which i would highly recommend. however it does not matter where i programme the valve to open, it makes no difference to the power before it opens.

les.

folks,

i have fitted a new old stock tzr125 barrel to a project of mine, so, standard size bore. however the power valve came from a barrel that was bored to max 2mm over and had been machined back for clearance from the piston.

the bike struggles to get to where the power valve begins to open and then rips your arms off. i am wondering if this hole in the power could be due to excessive power valve clearance (as in the valve is effectively "open").

any thoughts anybody?

les.

i hope so!
the dt250mx (i think dt250e/f in usa) only makes 17hp, as opposed to 38 for the yz250, so should be fun!

a couple of ideas.
i am working on a project involving a dt250mx engine in a better rolling chassis and had the idea to graft on a yz250e cylinder for more poke. the cylinder i bought was 2mm over, and i discovered that there are very few pistons available, all of the forged pistons are expensive and skirt-less so life was not going to be long. so i had the idea to have it re-lined with a bridged inlet port and use an IT250 piston which has the full windowed skirt. the job came back from PJME in the UK and is superb, blasted barrel, relined and bored to 1.5 thou for 250 euros including postage.
another advantage seems to be that standard genuine pistons are very cheap (i paid 25 euros) because i suppose no-one has standard cylinders any more, so this relieved some of the re-line cost.
i suppose this could be done if someone was fitting tz cylinders to an rd, and improve piston/cylinder life.