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Scooters - 125 to 300 => Super 8 150 => Topic started by: Amaro321 on July 17, 2015, 12:01:47 AM

Title: S8-150 CDi Rev Limiter??
Post by: Amaro321 on July 17, 2015, 12:01:47 AM

Sooooo I've come across the question, are the CDi's on our S8 150's limited??

Title: Re: S8-150 CDi Rev Limiter??
Post by: zombie on July 17, 2015, 12:40:31 AM

No installed limiter.

The only limit is the timing curve drops as the RPM's increase. It's a pre programmed safety feature for the engine to prevent detonation on bad / low octane fuels.

A rev limiter will kick in at a given RPM, and fire every other cycle to limit power.

Title: Re: S8-150 CDi Rev Limiter??
Post by: Amaro321 on July 18, 2015, 05:03:35 PM

[emoji15][emoji15] is there a way around this? And what have you done to yours to fix this

Title: Re: S8-150 CDi Rev Limiter??
Post by: zombie on July 19, 2015, 01:11:43 AM

Well if you want to get into tuning the bike for a bit more "umph"...

http://www.hpi.be/068.php?cyl=1 (http://www.hpi.be/068.php?cyl=1)

That's the inner rotor ignition from HPI. Combine this with their digital/programmable CDI, and you have a faster revving, better running bike.
You will have to purchase their "charging coil", and convert all the lights to LEDs but it's the best you can get for your ignition system. The kit comes with a 45k volt coil so it will never misfire.

If you call, and talk to them they will do MUCH better than the advertised pricing. Now there also MAY be a way to use just the CDI. I am looking into this for another member here.

If it can be done I'll post a thread.

Title: Re: S8-150 CDi Rev Limiter??
Post by: Amaro321 on July 22, 2015, 04:11:33 PM

GREAT!!!! Thanks!

Title: Re: S8-150 CDi Rev Limiter??
Post by: skishades on October 23, 2015, 05:50:01 AM

Is this another upgrade I need zombie? Big Bore kit, carb, pipes and air filter are done and I am planning the a transmission rebuild... now I need a new CDI program. Let us know please... ;D

Title: Re: S8-150 CDi Rev Limiter??
Post by: Eugene on January 15, 2016, 11:03:30 AM

Quote from: zombie on July 17, 2015, 12:40:31 AM

No installed limiter.

The only limit is the timing curve drops as the RPM's increase. It's a pre programmed safety feature for the engine to prevent detonation on bad / low octane fuels.

A rev limiter will kick in at a given RPM, and fire every other cycle to limit power.

Hi zombie,

I was just about to change my CDI and bumped into this.
So what you're saying is, it's not from the CDI that's limiting the RPM?
All along I was thinking that one of the functions of the CDI is to limit the REV after reaching X number of rpm.