was riding with a friend in town at night, when I accelerated HARD from a red light…
I went for 10 meters maybe and then the Rd felt as if it was in Neutral. Damn!
Couldn’t see a thing and since I was close to my house, I just parked it in the street.
Next morning I found my chain right at the red light, a link had burst open, several more were stretched.
I had derusted the chain a feww weeks before… never ever use Posphoric acid to treat chains!
Obviously, it fatigues the metal severely. The master link was still firmly attached to the chain…
I tore my carbs apart (Rd400D) and cleaned the needle tube… this seems to have cleaned up the mid range quite well. Carbs are clean. New float valves set up right (23mm from gasket)
Still when I give it a fistfull and change gears up, as soon as you pull the clutch in, it revs up. Clutch out revs go back to where they should be… it takes a good 500-800rpm up on clutching.
Also when you give it just a bit of throttle (say 3500 rpm) and you go back to idle, the revs stay at 2000 rpm before slowly going to 1200 rpm. I can’t find any air leaks.
Any hints & Clues as to what to check? My MOT is due on Monday, and I’d like the bike to be spot on.
I took it for a spin, my MOT is on 27/11, so have to fix all niggling problems.
The Speedo crapped out (turned out to be the u-bit inside the wheel)
What i really didn’t like too much is this:
If you open it up, like seriously 6’000 rpm and more up to a good 120kmh and then change gears, the revs don’t go down during the change… revs up when you clutch it.
Nothing dangerous but a bit uncanny.
Other thing is at same speed/revs, when you slow (you have to at some point!), without clutch, just letting oof the gas grip,
it displays the worst “ramheading” (direct from the french, sorry!) I’ve ever felft: ie revs decrease but not nicely, but you get the feeling of bom-bom-bom-bom and it’s hard enough that you get the impression the motor is moving in the frame … it isn’t, probably just the rubber bushes transmitting the motor’s behaviour.
I am not a newbie with old two stroke, and expected the motor to just rev down and not fight it. ” ramheading” feels a bit like when you close an old water tap and your hear that noise in the water pipes… know what I mean? Correct Engrish word anybody?
Both my mechanics mates told me this sounded like the bike was too rich, specially the surging at high speed when changing gears.
Apart from that, the bike is quite impeccable, but starts very often without choke… another hint of richness? Idles great, revs well,plugs OK, baffles too, new everything, etc…
Very flickable… I like it!
What do you guys think? What should I do next? Oh, and now I know what you were talking about the 3500 flat spot!
I received finally my parts list from Marcel Vlandeere, and sure enough, for most of the markets, the T250 was sold without a regulator. But for the swiss, french market, it was sold with a specific alternator, a regulator, loom, LH control and turn signals as standard fitment. South African and Brazilian customers had a locking fuel cap as standard…
I will have to put the reg back on the bike.
Placeholder for the YDS5 story
Placeholder for the RD 250 LC project
Chris Dupen, the owner of VJMW in Oz, can supply the rare seat covers for the one-year only T250, 69 model.
Here is what it looks like on chris’ Bike. Pretty good, eh?
Received my complete loom and accessories from the US… paid 3 month agao and just received today… there were posted on the 9th of MAY!!!
Just in time to stop me from rebuying all this stuff. I just need an afternoon in the workshop to put it all back together.
Motor’s back in the frame but couldn’t get my gear change to work
Off with cover, off with clutch…ummmm errr oKAY return spring fitted the wrong way….
Cover back on, kick, kick, crunch. Kickstarter spring not tensioned
Tomorrow is another day.
But i found something floating in my crankcase:
What is this? It’s labeled 330. I seem to remember there was some of these strange plastic jet on this bike, but I can’t find for the life of me where it should go.
A very embarrassed Spike
This thing got there uninvited, as I stripped the motor to fit newish crank and so on… but I left the oil filler cap off for about a month and the motor was on my bench… things just like to jump into stray motors, you know?
Strangely, last week-end a mate told me to put the cap on, as stuff could fall in there…
Now what is that jet and where (which bike?) did it come from? I’m nonplusssed…
Found more electrical stuff at the breakers, my rectifier was missing so that’s sorted. The frame is clean I could refit the motor now…still missing others thing, ballast, I don’t like my coils (the wires look melted), a turn signal cancelling unit and of course turn signals (saw them at the breakers).
Wish my parcel from the states would arrive or was I burned?
