Gilera sc 125 de-restriction help

[mikey]

Hi all, I have a gilera sc 125 which I've tried de-restricting but struggling with it, it has a strange limit at around 8 though revs!!! can not get past this

[Calum]

What year is it?

I appreciate they're DTRE engines, which inheriently aren't restricted, but I don't know what CDI they run.

Your best bet is to get a Zeeltronic ignition system for the DTRE and fit that.

But as a guess, I'd say it's the powervalve. If you pin the powervalve open and disconnect the YPVS and see how it goes then, that'll eliminate that as a potential issue.

Assuming the engine is all healthy etc.

I wouldn't have thought they'd run the reed switch etc, and if anything probably run the DTRE CDI and therefore maybe there is a green/black wire that you can earth to make the CDI full power.

But again, they're even faster with a Zeeltronic.

[mikey]

Hi mate it's a 08 plate bike and I'm sure they run a reed switch that stops it going past certain speed, not a clue how to sort it though

[Calum]

@mikey Oh cool, yeah they're different.

https://www.125ccsportsbikes.com/threads/gilera-sc-125-help-on-frame-derestricting.67970/

Apparently you just need to swap out a fuse somewhere to address certain parts of the restrictions.

[mikey]

I've done that fuse under the seat that just activates the power valve, still get the speed restriction though

[SpookDog]

@mikey

Does it only rev to 8K in top gear, or every gear?…

[mikey]

Every gear mate

[Calum]

@mikey sounds like powervalve to me. Not setup right.

[mikey]

How do you set the power valve up mate

[Calum]

@mikey Have you tried Googling it?
https://www.google.com/search?q=setting+up+the+YPVS+powervalve+yamaha+dt+125&client=ubuntu&hs=Xk9&sca_esv=579665665&channel=fs&sxsrf=AM9HkKkXKveMG0PW-c8BNggc79VAamWexw%3A1699220016183&ei=MApIZYntCtSFhbIPqsiPkAk&ved=0ahUKEwiJxdbr562CAxXUQkEAHSrkA5IQ4dUDCA8&uact=5&oq=setting+up+the+YPVS+powervalve+yamaha+dt+125&gs_lp=Egxnd3Mtd2l6LXNlcnAiLHNldHRpbmcgdXAgdGhlIFlQVlMgcG93ZXJ2YWx2ZSB5YW1haGEgZHQgMTI1MgcQIRigARgKMgcQIRigARgKMgcQIRigARgKSIUeUKsHWNwccAJ4AZABAJgB1gGgAYkRqgEGMC4xNC4xuAEDyAEA-AEBwgIKEAAYRxjWBBiwA8ICBBAhGBXiAwQYACBBiAYBkAYI&sclient=gws-wiz-serp

Literally tells you without having to click through a link.

[SpookDog]

@mikey

I think it’s more likely that the CDI is restricting the revs in a kind of ‘limp mode’

Again. Read @Mr-Shadi post about the read switch.

[SpookDog]

You might have to earth out a wire on the CDI unit on your bike. There are some weird restrictions I don’t know about.
Like my TZR had a black/green stripe wire earthed out on it…