niknak750 Posted October 21, 2015 Posted October 21, 2015 Having just bought a project 750 j from this weekends Stafford show, (Dutch import to be registered). I have been informed that the chassis number shows this to be a Jap home market bike.I have also read on a few forums that this might be restricted to 77 hp. Anybody got any info on what restrictors might be fitted.Not ridden the bike yet, was hoping to re-live a bit of my youth that included 750 j and l models. Quote
Guest YoshiJohnny Posted October 21, 2015 Posted October 21, 2015 Not too sure aout the J model but I suspect it will be a combo of parts rather than one. Exhaust CDI etcRide it first...it may be fine Quote
Jaydee Posted October 22, 2015 Posted October 22, 2015 A lot of Jap market Suzuki's are restricted in 4th and 5th gear rev range. The CDI gets a resistance value from the gear sensor and starts lowering the rev limiter in 4 and 5 to stop you breaking the Japanese speed limit. (1st, 2nd and 3rd full rev limit) I was working on a Jap market bandit 750 last year. From what I remember, there was a pink wire from the gear sensor going to the CDI. I had to solder in 1.5k ohm resistor on the pink wire just before the CDI. It tricks the CDI in to thinking its in 3rd gear (1.5k ohm value) so that you have the full rev range. As said there are a few other ways of restriction, think another one was something to do with a wire inside the clocks i.i.r.c. Quote
Captain Chaos Posted October 22, 2015 Posted October 22, 2015 A mate in Holland had a JDM spec 750J, above 80 km/h (50 MPH) a red light "speed" came on. And it didn't go any faster than 180 km/h.The speed light is activated by a switch inside the speedo, easy to undo that one. Quote
banoffee Posted October 22, 2015 Posted October 22, 2015 My JDM 750L was restricted by the CDI (different part number to UK). A previous owner had fitted one of those plug and play derestriction boxes however didn't realise it had much smaller mains as standard too.I treated it to a UK CDI, a dyno run and some more appropriate mains, sorted. The J may be similar. 1 Quote
niknak750 Posted October 22, 2015 Author Posted October 22, 2015 Hmm, possibly not the 'easy project' I thought, but they never are I guess. Just waiting for the carburettor refurb parts to arrive then I'll give it a run,I don't mind a few mods but if it has different heads /cams pistons etc then it a different game.The pink wire to the cdi reminds me of my 400 import gixer.Does anyone still do a rear solo seat converter for this model? Quote
Blubber Posted October 22, 2015 Posted October 22, 2015 A mate in Holland had a JDM spec 750J, above 80 km/h (50 MPH) a red light "speed" came on. And it didn't go any faster than 180 km/h.The speed light is activated by a switch inside the speedo, easy to undo that one.I believe that one is triggered by an optical sensor in the speedo. Quote
niknak750 Posted November 2, 2015 Author Posted November 2, 2015 Well having been through the carb and some expense , New slides, guides, needles, jets and seals.I am now thinking the ECU may be faulty, engine starts but wont rev cleanly without misfire then dies just before coming back to tickover.Any idea's or recommended sources for ecu testing / exchanges. Quote
Jaydee Posted November 2, 2015 Posted November 2, 2015 engine starts but wont rev cleanly without misfire then dies just before coming back to tickover. Have you set the mixture screws and float heights to base settings? Still sounds carb/fuel related to me. Quote
niknak750 Posted November 4, 2015 Author Posted November 4, 2015 Thanks Jaydee, I will have another look at the float heights and air screws. Currently set at 1 3/4 turns out??Have had a few suggestions to change the coils also. Quote
samtait87 Posted May 15, 2023 Posted May 15, 2023 Just bought a replacement warning light cluster and noticed it has a Speed Warning so I’m guessing it’s off a JDM bike? Quote
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