allspeed or micron?

[perence23]

hello i have been reading alot about all 125lc's with allspeeds losing power after 9k like the ignition has been turned off. and that this does not happen with a micron and that there is constant power to 11k is this true and is there anyways around this?

[looey]

Hi mate,

I have a couple of large can Allspeeds here and when fitted to my Mk1 RD125LC it is like you say, like having the ignition switched off when you get to around 9k. Having said that I would say that the power is stronger up until that point than that of the Microns, so I reckon that if you're ragging it thought the gears changing just before that 9k stop point, you could well be quicker but then 9k in top will limit your top speed.

Thing also is that you can change the power deliver and rev-limit quite a bit but the stinger arrangement and length of the end can also on the Micron pipes. I'm currently running a Micron with removeable end can with a shorter Sterling end can fitted and the stinger removed and it goes pretty well revving out to 10-10,500 rpm. There's not really much point revving them anymore than that in search of power and if you can or do then you'll just be rebuilding your crank more often

[carlos]

mine revs well into the red, but it's far better changing up before, it accelerates better at 8000 4th than 11000 in third for example!

[perence23]

so personally what would you prefere to run the allspeed or micron ?

[looey]

I'd be happy to run either if I only had the one but my Micron is the only one that's in nice condition, so that's the one that is fitted at the moment.

From time to time I will swap them over as the bike's pretty much as fast with either. After that it's just personal preference on looks really.

[spondonchris]

Allspeed for ok power, Micron for top end power, on a 125 id go for the Micron every time. Allspeeds lose power over stock in most cases but they do sound nice. I have speeds on at the moment but they dont rev well.

[looey]

It's weird, cos in 1984 when my first Mk1 was brand new I fitted a brand new original SMALL can Allspeed (both I have now are large can) and it revved right through to 10,500rpm no probs and was faster acceleration and top end than every one I came across with a Micron fitted.

It would do 100mph everywhere even 2-up and to prove to my older brother at the time, the day before I sold it I did 100mph (on the clock anyway) down a dual-carriegeway with us both on the bike sitting upright and he was looking over my shoulder to see for himself.

I'm pretty sure my the 10W bike I have now wouldn't do that and it has just had a full engine rebuilt within the last 1000 miles, is running the std airbox with a pipercross filter element and 170 main jet (but I haven't tried to be honest).

Mine was a 12A with the small can Allspeed fitted, std airbox, std airfilter element and std main jet with just the needle raised one notch and that was it !.

Don't get me wrong, I'm more than happy with the performance of mine now and I've got absolutley no intention of spending a single second trying to make it any faster, if I was to go faster I'll go out on one of my bigger bikes .

??

[perence23]

at the moment i am running standard bore with a tzr piston, premix with a 230 jet with an allspeed. im hoping to get around 85. does that sound possible. and would i get more topend with a micron as i have been offered one by someone i know.

[looey]

Well in my experience any 125LC that's not fitted with a restricted 12A exhaust should be hitting 90+mph without any trouble.

The only way your Allspeed will be causing you any probs is if you're hitting 9k in top which is hindering your top speed.

If you've been offered a Micron (as long as it's not silly expensive) I'd buy it and try it, if it makes your bike better then keep it but if not, then stick it on evil-bay and make a few quid

[tsa]

buy a Nikkon far better than either of these for power in my opinion.

[Norbo]

On a 125 i like the look of the Micron they sit Higher .

[blakeseven]

Back in the day put an allspeed on my mk1 ended up putting a modified standard pipe back on as i couldnt get it rev out.Seemed to give reasonable power throughout the range looked cr@p tho

[rd50084matt]

My Gibson/allspeed gives good power up to about 9k then nothing,mates got micron on his it goes better but iprefer the allspeed look/sound so can live with power loss,tbh a std unrestricted pipe is better throughout!!??My bike does just over 80,mates does 85.

[blakeseven]

The "modified" standard pipe I had on mine had been sorted by a local scooter tuning mob called miceck. It had been cut into three segments and rewelded dont know why but it was from a riding point a view a better pipe than the allspeed . Wish i d known more about carbs and set up when I was a spotty 17 year old always wondered why it wouldnt go past about 85

[perence23]

Which exhausts are the best for performance, like the top 5 ? i wanti new one but one that is good for performance really not bothered really about the sound. Are Nikkion exhaust any good?

[rd50084matt]

got a small can micron to play with now so i might try that as a comparism to the allspeed with no other changes-if its better then its the pipe!!
tbh a std unrestricted bike with original yam pipe prob is best all round pipe but then they do sound abit crap-noise is good..lol

[midlifecrisisrd]

Had a similar experience in the early nineties with an 31k 350.
Bought it with microns and would rev to 10500 but had big flat spot at 5.5k. Fitted large can alspeeds with a stan stephens stage 2 tune and was, as you said, like hitting a wall at 9k. Was seriously fast though up to that.

Strangely now have mildly tuned motor with small can gibsons and revs out no problem.

Steve.