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Post by broughton5 on Oct 20, 2012 20:24:48 GMT 1
right guys honest truth was just wondering what top speed you lot are getting out of your 125,s, had mine out yesterday laid on tank head tucked in fairing just over 85, micron fitted 10v carb fitted with 165 main jet. come on guys no porkies ;D ;D ;D
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Post by crash on Oct 20, 2012 20:32:28 GMT 1
how much do you weigh mate,26 years ago when i was 12 stone my unrestricted mark 2 would do 85mph on the flat and 95mph down a bloody big hill tucked in ,them where the days.
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Post by raven13 on Oct 20, 2012 20:34:50 GMT 1
i get 70 out of mine on a regular basis (wen its running that is) and thats with my rather rotund 16+ stone on it
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Post by looey on Oct 20, 2012 20:40:28 GMT 1
Does sound a bit light that  . Can depend on wind conditions, especially for taller or larger riders  ;D Is it really running a 10V carb or 10W ?, 10V is a DT125LC Carb init ?  Mine will get to 90 pretty quickly, the next 5mph to 95 reasonably quickly. It will do the magic 100 but it's revving its nuts off by then so don't make it do it very often. I have a GPS calibrated Sigma computer fitted to mine and I can tell you that 100mph on the speedo is a true 91mph  |
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Post by copper99 on Oct 20, 2012 21:15:48 GMT 1
Have you guys read the 125 article in this months practical sportsbike mag?
Bloody hilarious, plenty tales of 100MPH 125s...
Ill scan it if you wish..
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corf
Drag-strip hero
Posts: 251
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Post by corf on Oct 20, 2012 21:16:12 GMT 1
when i had my mk3 standard airbox with 210 main jet and micron
i weight 11.8 and got 90mph on speedo
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Post by bertiemollie on Oct 20, 2012 21:31:58 GMT 1
I would say 95 on the clock is good. Less than 90 I'd say not quite right unless you're a porker |
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Post by broughton5 on Oct 20, 2012 21:35:51 GMT 1
i weigh about 13 stone, and yes it is deffo a 10v carb and yes they where fitted to the dt . my mk2 back in the day did 90 with allspeed fitted, and i probably weigh a stone more now than then . i know lucky b**tard.
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Post by twostroker on Oct 20, 2012 23:19:59 GMT 1
when i had my mk2 125lc with a fahron 175cc top end,pwk 28 carb and a pipe built to suit the motor it would easily pass the 100mph mark id say 105-107mph on the clocks but i never tested it with gps sp probaly 90 odd mph in reality.
oh i was 60kg (under 10 stone) at that time.
looking back that damn thing was a nightmare to get running correctly and cooling was always a issue,would have been better left standard :/
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jackup
Thrash Merchant
Of all the things I've lost I miss my mind the most
Posts: 388
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Post by jackup on Oct 21, 2012 0:34:42 GMT 1
I think 85 is within easy reach on the flat with most rds with a bit of upjetting and still have a useable bike
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Post by billy on Oct 21, 2012 17:50:52 GMT 1
I got my dads Mk1 up to 79,5 mph, but I know it could have gone a little faster if the road didn't turn lol. I'd say it could have reached something like 82 mph at most. It was a stock Mk1 with 10w carb, exhaust etc. Now it has a small can Micron exhaust and it's way stronger when playing around on the lower gears. I havn't tried getting it to speed yet though as I havn't got it jetted yet.  I think with the Micron pipe it could reach maybe...... 85 mph? That's with me on it though, I'm 11 stone (or about 70 kg's). |
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Post by twostroker on Oct 21, 2012 18:27:42 GMT 1
i can tell you a 125lc with at a speedo indicated 100mph feels mega dangerous. mine felt like it was flexing where the swing arm met the frame under hard acceleration and very unstable over 80 mph. all 3 125lc's ive owned felt scary over 65-70 mph tbh |
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Post by crash on Oct 21, 2012 18:54:28 GMT 1
myrd 125 felt fine at the time?mind it was brand new,but the 12 month old 350 f2 i had on other hand tryed to kill me several times !tank slappers anybody.
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Post by mellow on Oct 21, 2012 19:02:29 GMT 1
i weigh 9 1/2 pebbles and my mk3 engine will do 80 everywhere,uphill,down dale etc etc in 4th. I had 95 out of it in fifth but when i change to 6th the revs drop and it wont pull. Standard engine,working ypvs and nikon pipe  |
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Post by looey on Oct 21, 2012 19:11:39 GMT 1
i can tell you a 125lc with at a speedo indicated 100mph feels mega dangerous. mine felt like it was flexing where the swing arm met the frame under hard acceleration and very unstable over 80 mph. all 3 125lc's ive owned felt scary over 65-70 mph tbh Blimey , are you sure they were setup correctly with everything in good order ?. I know all too well from experience how little things can make a big difference to handling on these little bikes. Get it all spot-on and they should be fairly stable. The only time mine gets a little lairy is a high speed wide cornering when it tends to get into a very slight weave but it never gets bad and I just ride through it. Probably a steering damper would sort that but I don't think it necessary ;D For example......, I take mine over to the IOM TT some years and a good example would be through the Quarry Bends. I can get the 125 upto 90 on the clock before entering them and can hold that speed from start to finish through them and it tends to weave a little all the way through ;D ;D Most common culprits are: Notchy or badly adjusted head bearings Oversize tyres (maybe one size over on the rear but never oversize the front !) knackered Rear Shock Absorbers (cr*p damping) Knackered Swingarm bushes |
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Post by Paul Dawkins on Oct 21, 2012 20:34:58 GMT 1
I weigh 8 stone and I have had 105 out of my Honda C90 chicken chaser and I was only in second gear... |
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Post by looey on Oct 21, 2012 20:42:35 GMT 1
And weren't you blind-folded at the time ?..... lol
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Post by twostroker on Oct 21, 2012 20:51:06 GMT 1
i can tell you a 125lc with at a speedo indicated 100mph feels mega dangerous. mine felt like it was flexing where the swing arm met the frame under hard acceleration and very unstable over 80 mph. all 3 125lc's ive owned felt scary over 65-70 mph tbh Blimey , are you sure they were setup correctly with everything in good order ?. I know all too well from experience how little things can make a big difference to handling on these little bikes. Get it all spot-on and they should be fairly stable. The only time mine gets a little lairy is a high speed wide cornering when it tends to get into a very slight weave but it never gets bad and I just ride through it. Probably a steering damper would sort that but I don't think it necessary ;D For example......, I take mine over to the IOM TT some years and a good example would be through the Quarry Bends. I can get the 125 upto 90 on the clock before entering them and can hold that speed from start to finish through them and it tends to weave a little all the way through ;D ;D Most common culprits are: Notchy or badly adjusted head bearings Oversize tyres (maybe one size over on the rear but never oversize the front !) knackered Rear Shock Absorbers (cr*p damping) Knackered Swingarm bushes funny enough my 175lc did have a oversize rear tyre and new swing arm bushes but i was never happy with them, i was convinced there was a tiny bit of play even with all new parts fitted  |
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Post by looey on Oct 21, 2012 20:54:26 GMT 1
I weigh 8 stone and I have had 105 out of my Honda C90 chicken chaser and I was only in second gear... Yeah Mells, you bullsh*tter........ 95 in 5th gear ;D ;D ;D |
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Post by Paul Dawkins on Oct 22, 2012 7:42:11 GMT 1
And weren't you blind-folded at the time ?..... lol And I had my hands tied behind my back. |
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Post by mudguts on Oct 22, 2012 7:51:26 GMT 1
Back in 83 when my Mk1 125lc was new with micron, ledar, reeds,
down a slight slope with a tailwind it did 106 indicated 2 up, with 2, 8 stone riders, now my Mk 3 which ive just rebuilt with allspeed,
ive managed 75 in 4th, 80 in 5th, but its way too rich and needs
jetting down, its got the valve fixed open, the only trouble is
to go from 1st gear to 2nd gear powerband you have to give it full
throttle, or it will drop out of 2nd gear powerband, (14,5stone rider!)
i may drop a tooth on the front!
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jackup
Thrash Merchant
Of all the things I've lost I miss my mind the most
Posts: 388
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Post by jackup on Oct 22, 2012 12:50:05 GMT 1
Drop 2 you at least you will notice it then
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Post by Nismosis on Oct 22, 2012 13:49:33 GMT 1
I'm 15 stone and I managed 75mph (speedo indicated) on my Mk1 and that was with no top piston ring (sitting upright too)...
My bike deserves a medal!
:-)
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Post by mellow on Oct 22, 2012 21:49:06 GMT 1
Yeah Mells, you bullsh*tter........ 95 in 5th gear ;D ;D ;D tis true  |
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Post by twostroker on Oct 23, 2012 18:08:49 GMT 1
i bet im getting laughed at about my 100+ top speed mk2 125lc. im not telling porkie pies i was lucky to have the help of some very knowledgable people to help me buid it including ron fahron and baz from blue haze engineering. it was never reliable but it was certainly a bit faster than a stock 125lc and could get the speedo off the 100mph dial.
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jackup
Thrash Merchant
Of all the things I've lost I miss my mind the most
Posts: 388
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Post by jackup on Oct 23, 2012 19:10:11 GMT 1
Reliable and rd don't always go together I think part of the thrill of riding them is that at anytime they could go bang lol
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Post by steve h on Oct 23, 2012 21:21:31 GMT 1
Dave Hunter had one that had 28hp and did 108.25mph in 84 @ MIRA. |
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Post by mrnegative on Oct 31, 2012 13:29:57 GMT 1
mine does (still does) 85MPH fine, any more and its against the red line so havent pushed past 85. Thats a mk1 with the new large can micron on and performance panel filter in the standard airbox.
Probably only doing 30mph though knowing clocks are probably way out lol.
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. Can depend on wind conditions, especially for taller or larger riders 
;D
I think with the Micron pipe it could reach maybe...... 85 mph? 
