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Cynic last won the day on April 30

Cynic had the most liked content!

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About Cynic

  • Rank
    Modern + Motorcycle= zzzzzzz
  • Birthday 02/10/1971

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  • Current Bike(s)
    Yamaha Dt175mx (81) owned 32yrs TDR250 (88) CB175T (71) 1200Vmax (98)

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  • Location
    Middle of middle England
  • Interests
    Anything mechanical, from static steam engines to Rc helicopters......

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  1. Yep, sounds like perm choke. May not need full choke in the summer but should always need a little from stone cold.
  2. Providing i can get the time off due to the now critical hgv driver shortage, im up for it, bike is far better this year too. Keilder is a trek, looking at 5hrs min if i go the straightest fastest route stopping for nothing but fuel.
  3. Was there anything showing on the plugs, excessively wet or black. Ig is easier to check than carbs but ultimately it sounds like you need to give the carbs a good clean. Your coming off choke at a mile or so as the engine gets up to temp and as she wants a leaner mixture it sounds like she isnt getting it and chokes out.
  4. Cynic


    It's got ypvs in dirty great letters on a fitting on the right hand side of the engine. If you have a learner legal (haha) model it may just have what looks like a bolt sticking out of the rhs of the barrel. Either way Google mk1 and mk 3 rd125lc. The mk3 had ypvs, the mk1 didn't. Look at the barrels on the engine. The difference is obvious.
  5. I cannot find tx500 stuff, but its apparently pretty much early xs500 so i was looking at the 75 xs500 which looks to have the same kickstart mech as most yams running on the clutch basket ring gear. Cannot find anything to confirm that though, could be a longer shaft running on one of the gearbox idlers maybe but that seems a lot of hassle The starter motor runs a chain to a starter clutch that turns the crank, looks identical to my vmax. Spent far too long wondering about it now.
  6. Ah so the starter runs through the gearbox. Schematics were a bit vague. Showed the kicker and the starter separately. Could be starter related then?
  7. Half a turn and stops? So what happens if you put it in gear and turn the rear wheel. With the clutch fully stripped as that centre should spin freely in neutral. Also, i dont get how messing with the clutch affects the kick start, the crank and clutch basket are constant mesh, the kickstart drives the outer ring of the basket. You could take the clutch pressure plate, friction and steel plates out entirely and she would still start on the kicker.
  8. That made me chuckle, the 'plug colour' does not actually mean the spark, although its nice to know its a strong blue spark. The plug colour check is actually referring to the electrode on the plug its self. White deposits and red specs on the electrode point to lean mixture and/or bag ignition timing. Ideally a light coffee brown is the ideal with black and sooty or black and oily being bad options obviously. Good news is that 100cc bikes are generally ridden hard (not a lot else to do with 10hp) so a plug chop (checking colour) is quite a good guide to engine running. It does
  9. So if you take the plain and friction plates out of the clutch does the inner and outer basket move ok, the outer should move with the crank, the inner should spin freely in neutral and you should be able to drive it turning the rear wheel at different speeds depending on gear.
  10. Nope, most yam 2 strokes generate their own ignition power, you could chuck the battery in the bin and it would run fine. May well blow every bulb on the way back mind.
  11. You need to change the voltage regulator not the rectifier. Dont spend a bloody fortune on one either, its the same regulator on a vast list of yams, something like this:- UNIVERSAL 6 Volt Voltage Regulator Fits All 1968 - 1983 Yamaha Enduro Models | eBay Will do fine.
  12. With the miles you ride you will notice a difference, though if i may? from my neighbours experience, there is a mileage limit on those carbon wheels. He trained on alloy rims and raced on carbons.
  13. What?, no you cannot do without it. it takes the tightening torque of the spindle, without it you put a massive load directly onto the bearings and the wheel will never tighten properly. Dangerous, nigh on suicidal. Its in a lot more than the thunderace, the yzf 750, fzr600 xjr1300, its a good list. 35 quid new from fowlers.
  14. I had something similar when I used an emergency circlip fix (read bodge I was 17) on a gp100. The jet needle was lose and could move and made the bike do some odd things.
  15. Some know already but , well sometimes things feel like there is a higher order. On the vmax forum there was a fellow selling a set of carbon dymag wheels, i saw the advert September last year time but had neither the money or the need at the time. Fast forward, months of covid lock up, (i keep a little slush fund to pay for my biking which has just gone up through last year). Then the drive hub shat its self and the crap that followed. Well i stumbled back across the wheel add, no comments on the post, wheels had low miles, maybe a couple of thou. With tyres and such and with t
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