www.zxrworld.co.uk

First of all my bike is an L2 ZXR400 and its had this revving problem since i got it. Ive looked at all the other threads and none of the suggestions worked for me

When i bought the bike it needed a new wiring loom, i was told that any would work so i bought one from an L8 model which turned out was slightly different so I swapped over a few of the connections to get everything working like the indies and lights etc and I have no problems with them now and the engine starts fine.

I have taken some photos of the back of my clock for you to look at because i honestly cant see why it wont work.. :smt013

First of all here is a picture of the CDI that it has:

21119-1331
1318005600
12v TNCF16
DENSO JAPAN

I have read that the blue one is the right one to have as its the UK one.

Now, there is a small box which says M-Max on it which ive discovered is meant to be the derestriction but its not working for me :p


The cable in my hand in the picture is what the box is connected to.

Now here is a picture of the connector block which the M-Max box is connected to and there is a pink wire which has been cut.


However, here is what that block connects to and were the pink wire goes in there is nothing for it to connect to...


So i am completely lost as from what i can see my bike should be revving out!

Here is a pic from the back of the clocks too just incase.


Hope someone has an idea because I certainly dont

Cheers,

Scott.

well, you arent the first to have issue's with a *1331 cdi,

the 21119-1332 cdi with a blue sticker and an "M" on it is guaranteed to work ... google the part numbers and you'll see what i mean..

its possible your Mmax box is for an H. ??

if you remove the Mmax box and plug the loom into the speedo will it rev out ?

A) if it will rev out but restrict you to 180kph, then you know everything is working as intended, that your cdi is restricted, and that your Mmax box (for whatever reason) isnt working as intended.

B) if it still limits to 10k, there's something wrong in the loom somewhere as the CDI is NOT receiving the correct signal from the speedo (or the Mmax box when its connected)

if A) its the Mmax box

if B) its your loom ...

what excatly is your loom off ?

you say L8.. but uk or import ?


where are you located ?

The loom is off a UK bike according to AMS Motorsport.

Cheers for the reply Ill give those things a try then get back to you.

I live in warrington.

Ive removed the speedo but were abouts do i plug the loom into the clocks?

When i rev it in Neutral it will go past 10k if this means anything atall.

warrington .. haha ..

i was there a couple of days ago .. nevermind ..

right ..

a uk spec loom wouldn't have the wiring that goes from the speedo to the CDI .. its just not there. which is probably why your "restricted" (contentious issue these 21119-1331 cdi's) cdi isnt getting the signal to say "ok chaps full power available"

only an import loom would have the wiring in to connect the kph speedo to the restricted cdi's..

uk looms expect a uk cdi, and an mph speedo (which doesn't have a plug on it)

you could try splicing the Mmax box into the loom near the cdi after careful examination of the wiring diagrams, ??

so either

A) its a uk loom and this is the cause of the problem

B) its an import loom with issues that's been miss-sold

C) its a import loom thats fine, but your Mmax box is toast

D) finally .. it "could" be a shagged CDI ... do you have another one you could try ?

I dont have any other CDIs to try unfortuntely. I think your right about the UK loom thing though as there is a pink on the loom which is already on the bike (bike is a parallel import) but were ive fitted the UK loom the pink wire isnt there.

If i get one of these 1332 CDIs may this fix it?

scott wrote:Ive removed the speedo but were abouts do i plug the loom into the clocks?

is/was it an mph or kph clock ?

the speedo (if a kph one) has some plugs coming off it.. some do the lights in the clock, the other goes to the CDI.. if it was an MPH speedo, it wouldnt have this plug.. normally the loom has a plug which matches (import loom) the "de-restriction" boxes ive seen simply plug into the loom at this point taking the place of the speedo.

scott wrote: When i rev it in Neutral it will go past 10k if this means anything atall.

not really, they rev up so quick the clocks get confused .. its what it does under load that counts.

It did have kph but now its got a mph clock fitted. But this was done by the previous owner, i do have the kph clock tho.

The only wires coming from the speedo are the bulbs.

scott wrote:I dont have any other CDIs to try unfortuntely. I think your right about the UK loom thing though as there is a pink on the loom which is already on the bike (bike is a parallel import) but were ive fitted the UK loom the pink wire isnt there.

If i get one of these 1332 CDIs may this fix it?

i'd certainly see about getting hold of a known good 21119-1332 cdi (with a blue M) to try..

try giving Chris at dynopro racing a call.. he's in runcorn and may be able to help.. i know he sells modded CDI's and knows what he's on about anyway .. shouldnt be too far from you.

there is a way of just passing the required signal to the CDI, but for the life of me i cant find the link atm.

scott wrote:It did have kph but now its got a mph clock fitted. But this was done by the previous owner, i do have the kph clock tho.

ahh k ..

scott wrote: The only wires coming from the speedo are the bulbs.

this true of the kph clock ?

The kph speedo has the cable coming out of it.

Right, i just fitted the kph speedo on and plugged the loom into it and it still wouldnt rev past 10k so from what you said earlier it must be the loom.. ?

if you get a cdi unit with an 'M' on it, it will cure all your problems.
the 'L' unit is restricted inside.
it does sound like the m-max box is knackered, or not for the L model bike.
good luck

Is it me or have you looked at that connector block wrong? From the two photos the pink wire goes to the top middle (of the 2nd photo) which has a connector spade, not the bottom middle. Reason i ask is cos the conector block clip that secures them is 90 degrees anticlockwise from the pink wire in the first photo.

have you tried re connecting the pink wire at all? I think some people work out that the pink wire is to do with the speed restriction and cut it to remove it. What they dont understand there is a constant signal from the clock to tell it whats happening, if its not plugged in the CDI goes into a default 10K rpm rev limit.

In the second to bottom picture you can see that the clip hole is on the left and so is the clip part that you can see in the background on the connector block. Looks to me like the pink wire matches up with the blank hole?