does any one have any information about this bike SMC yb125

**benandy92** · 02-25-2010, 09:15 PM

i recently brought this bike from a dealer in the uk and they have recently shut down and i am now at a bit of a dead end as regards to info so any info about the engine, spark plugs and exaust would be greatsly appreciated i wud put pics up but dont know how
many thanks
ben

**Sprocket** · 02-25-2010, 09:37 PM

Is this of any use to you ;

http://www.smcgb.com/news.php

**david3921** · 02-26-2010, 02:05 AM

ACDNate has a 150 that is a SMC. You might find some information here;

http://www.mychinamoto.com/forums/sh...hlight=project

**benandy92** · 02-26-2010, 09:41 AM

yer i have read the website and his thread and it is of some use but i still am not quite sure about the exaust coz i am new to bikes i dont wanna start cuttin bits up just to realize i cant put it bac on lol wat i want to do is decat the front header pipe and fit a new can but the whole system is one long pipe with the can welded on i think correct me if im wrong

**CrazyCarl** · 02-26-2010, 03:08 PM

One long pipe with the can welded on? I guess it's possible but pretty unusual.... usually there's a joint in there somewhere. If you haven't already, I would take off the plastics and do a physical trace of the pipe and make sure there are no joints.

CC

**benandy92** · 02-26-2010, 05:11 PM

ok will do btw how do i put pics up on here and any ideas about the front header
many thanks
ben

**SMCrider** · 03-17-2010, 02:35 PM

Hi mate. I also have the same bike. I'm no expert on exhausts so can't be of any help on that front. I've just ordered new bolts for the rear sprocket as one fell off, maybe a good idea to check if you haven't already.

**SMCyb125** · 10-03-2011, 07:11 PM

Hi, i have also just purchased one of these bikes off of my step dad, i needed a cheap run around to get to work and back, and i know he had looked after it. However its sooo slow, does anybody know whether this bike would be restricted, my friends have 125's and they hit 70+mph, i struggle at 55-57mph. if they are restricted how do i go about de-restricting it? thanks

**Kennon** · 10-05-2011, 10:14 PM

its 4 stroke air cooled so its a very laid back engine its going to be either based off a CG or CB 125 engine, 4 stroke 125 engines are very rare to be deristricted i can only think of 6 and there either a minarelli WR125 engine or a Derbi DB125 engine and both of those are liquid cooled 4 valve engines that are just capped to meet learner restrictions.
you could jet up the carb so its a richer mix but then it'll run hotter more likerly to be unreliable from this, change the carb to a bigger one same pro and cons, a unrestricted CDI so it revvs higher but tehn you could blow it and the heat thing once again.
safest thing for more speed is sprockets but gearing it up has its downsides aswell taking longer to get to the top speed and loosing some low down torque and you'll really feel the reduced torque especially in head winds.
a 150cc bore kit could work for some more 00mph

**SMCyb125** · 10-09-2011, 06:35 PM

ok thanks for the info, any ideas on if any body makes nobblys for offroad use for supermoto bikes? if so how do i find out if they will fit my smc? i went down a lane today and slid everywhere lol