www.zxrworld.co.uk

taken from a post by Zimm from another thread, zxrworld & zxr400ownersclub and any persons involved with either ie me will not be held responsible for any innaccuracies.

zimm wrote:all L model cdi's are interchangeable, as are H models, but you cant put an H on an L or vice versa as the ignition rotor lobe spacing is different.

SP cdi's (L model) have a different advance curve, but also require(?) a TPS and flatslides.

the UK spec L model CDI (which has serial number 1332) has no speed restrictor circuitry so will allow you to exceed 180kph without an MMax derestrictor, or kph/mph converter

errata : H and L cdi's are non-interchangeable due to an apparent difference in the loom, not as previously stated the differing rotor's.. apparently.. although its still a bit of a grey area, either way they wont "straight swap"

L box on an H has been tested and found not to work, although H engine in an L with original H rotor worked with the L box and loom.

additional : H cdi's have a higher rev-limiter @14,800rpm import L boxes limit to 14,500rpm and uk L boxes limit to 14,900rpm

masterofinsanity wrote:the UK spec L model CDI (which has serial number 1332) has no speed restrictor circuitry so will allow you to exceed 180kph

Just to add aswell, i read there were two blue sticker CDI's, a 1331 and 1332 and both are unrestricted. However I tried out the 1331 and this has a limit of 10,000rpm and only goes up to just over 100mph.

ive said it before but ill say it again anyway

my 1331 revs out just the same as my 1332 cdi and is not restricted that i can tell

Well that didnt happen with mine all i could get out of it was 10,000rpm!!!

Does the letters make a difference???

surely it aint gonna make any difference on the cdi if the limiter is in the speedo?

not limited on the speedo as i put the other one back in and it revs well over 10,000rpm

masterofinsanity wrote:surely it aint gonna make any difference on the cdi if the limiter is in the speedo?

it does, because the 1332 box doesnt talk to the speedo to find out what speed you are doing, so it doesnt know you've disconnected it either which is what triggers the 10k "limp home" mode.

hi, does a restricted cdi unit affect your acceleration?

If you have unplugged the speedo then yes cos the bike will only rev to 10,000

i just brought a uk cdi with the letter L on it whats the top speed?