Topic: Ignitor unit

[bwaller]

Hi guys, I've heard there are people out there that can make setting changes/repairs to OEM ignition units.

Namely the Suzuki GSX1100 box I'm using on the race engine, and I'd like to change the rev limit cutout.

I searched around but wonder if anyone could make a recommendation.

[Rocketman]

I used Carmo Electronics USA to repair the unobtainable CDI box for my RG.  The price was reasonable and it has worked flawlessly for 3 seasons.  They also have a European location.  Checked and one of the services they offer is to shift or remove rev limiters.

https://www.carmousa.com/index.php?main_page=index&pg=home&zenid=jkehcfu38o09n4hc19nbp8c6k4

[turboguzzi]

hei brent, in case you wan to increase rpm limit, boxes off the 750-600 should allow higher revs. might be cheaper than modifying IMHO.

my quick search found this too

http://www.nyco-systems.com/Products/mfr.php?mfg=1011

[Rocketman]

If you are looking for another 500 rpm’s the 89 to 92 or 93 to 98 GSXR 1100 appears to be limited to 11,500 rpm’s.

[bwaller]

Thanks guys, this might be the easiest route. The GSX1100 box is supposed to cut out @11,200, but by the dyno it's actually only 10,800. Good for engine management, but for Mosport we have to bounce off the limiter for a long way at the top of the straight. An extra 5-600 rpm would help there. Gearing any taller would hurt it elsewhere. 

[turboguzzi]

88-91 gsxr 750 limit is 12,500, nice for those instances that you want to carry a gear a bit longer.....

[bwaller]

We don't drop out of power at the current rev limit , so an extra 1K rpm makes sense. By 12500 it will be dropping off so I might rather save the wear & tear, although they certainly don't mind spinning up there. Good ign boxes are cheap, I'll try one to 11.5 first. 

Thanks again.

[Rocketman]

The GSX1100 igniter unit I am using seems to limit revs to 10,700 or so also.