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CRM250.COM - Modifications / Upgrades
There are plenty of aftermarket bits you can add onto your
CRM250 to make it distinctive, Some are worthwhile and some
are not. Below are some things you can do to make your CRM
different.
Engine and Performance.
MK2 Airbox Baffle, take it out and sling it away. it is not
needed and just seems to slow the bike down.
Exhaust System, now this may be the first point of call when
adding bits to your bike. The majority of people tend to use
DEP for the front and rear because they are cheap, look the
part, sound great & require no jetting changes. Some use
FMF but often these require jetting changes to get the best
from it.
Racing Reeds is another quiock and cheap power gain. Priced
at around £35 for 2 stage reeds make the bike feel smoother
and more responsive especially when a full exhaust system
is also fitted.
Spark Plugs, very often i have found the standard grade plug
to be fine, but it wears out quick and fast road riding destroys
it in only a few hundred miles. Better off with a NGK B9EGV
for better cold starting and cleaner running.
Bodywork & Chassis
Renthal Bars are very popular, not only do they come in some
cool colours but they are ver light and strong, So strong
infact that you will often bend the bike before the bars once
fitted.
Bark Busters are another handy addon, esp if like me you
smash your hand on a tree on the way past, resulting with
a trip to casualty. Priced at between £24 for cheapo
ones and £45 for the aluminium strip ones (i have never
broken a set of cheapo's yet the dearer ones seem to break)
there are plenty to choose from
Alloy Frame Protectors, So you may have noticed that the
paint is rubbing off the frame from your boots, well fitting
a pair of these will stop that and they look nice too. Priced
at around £70
Bash Plate is in my eyes essential. Quite expensive at around
£70 but the protection they offer the lower part of
the engine and frame is fantastic. How many times have you
grounded out to hear that horrible sound of rock and metal
? Once fitted they seem to collect all kinds of crap between
the plate and engine and often need cleaning out.
Grease Nipples are often overlooked, yet as our bikes came
from the factory with not much in the way of grease in the
swingarm and headstock then this mod makes much sense. Next
time you replace your swingarm / headstock bearings or seals
then take the time to drill a small hole and insert a grease
nipple for future lubrication. Once this has been done you
will never have to take it apart again. Not sure if anyone
has done this for the wheels but if you have please let us
know.
Speedo as the CRM speedo is in KPH the fitting of a MPH decal
is a must for road use. I have found that fitting it on the
inside of the glass and sticking it straight onto the speedo
face you can actually read it at night and stops it peeling
/ falling off in the future.
Headlamp, Use your MK2 or 3 for night time riding ?? then
get a AR headlight unit. You can actually see where your going
with one of these.
Other Modifications
Below is a list that was sent to me by Paul Blackmore. He
had a contact in Japan who raced CRM's and had plenty of experience
with the bikes. Below is the content of the list.
** PLEASE NOTE - THESE TIPS ARE TO BE USED AT YOUR OWN RISK,
NEITHER PAUL BLACKMORE OR MYSELF WILL BE HELD RESPONSABLE
FOR ANY DAMAGE / GAINS OCCURED **
CRM MK3: Take out stock air snorkel and re-jet carb to pilot
50, stock needle middle clip, main 158. FMF pipe or DEP pipe
also drill 3x 12ml holes in left side of air box. Boyesen
reeds part No 633 are good for this bike.
CRM AR:
1. Mugen hi-compression head
2. Mugen CDI
3. Mugen Jet Kit, includes 2 richer needles 35Y and 45Y and
small washer & spring, 1 richer needle jet, 4 main jets
160, 165,170, 175 and one main jet cool.
4. FMF Fatty pipe No. H 39, Answer carbon fiber silencer CF-II
(for CR250 92-96)
5. Boyesen Rad valve No RAD02SJ with carbon reeds.
Carb setting:
slow jet 45 (stock 48), air screw 1-3/4 turns out,
needle:Mugen 45Y middle clipped (35Y is richer),
main jet 160-162 (stock 148),
White Bros filter, air snorkel removed, drill 3x 12mm holes
on left side of airbox cover.
CRM AR:
1. Stock head
2. Mugen CDI
3. Mugen Jet kit
4. Procircuit Works pipe ND ANSWER CF-II
5. Boyesen RAD02SJ with CF reeds
6. 14/48 sprockets (must use modified chain guide
Carb setting:
slow jet 45, air screw 2 turns out
Needle jet: Mugen
Needle: Mugen 45Y 2nd clipped from top
Main jet:158
WB filter, air snorkel removed
CRM AR:
Carb settings:
Main jet 155
Slow jet 50 1-3/4 out air snorkel removed
WB filter
Performance exhaust
He goes on to say he believes if you want to de-restrict your
CRM and make it more powerful and respond better, Mugen jet
kit is needed.
Boyesen Power Reeds No 633 and Pro Reeds No Pro-02 for CR250
88-98 are good for all CRM250 89-99. Boyesen RAD02SJ is a
must if you race. It is designed for CRM250 89-96, to be used
on CRM AR, you have to modify it and install one more spigot,it
is for 2 stroke oil to go into the engine, or you can run
on pre mix instead.
Goes without saying, check the parts fit before you spend loads of money!
Good luck
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