Worth installing a cdi unit?

[psyeap]

Hi Guys,

I was just wondering if it's worth installing a cdi unit on my motovert 140 and if i did, do i need to re-tune the bike?

I'm looking at these sort of cdi's:

RACING HIGH PERFORMANCE CDI 150CC 250CC ATV DIRT BIKE - eBay, Bike Parts, Motorcycle Parts, Accessories, Cars, Bikes, Boats. (end time 12-Jul-10 20:00:33 AEST)


alloy performance cdi unit 125-300cc atv quad dirt bike - eBay, Bike Parts, Motorcycle Parts, Accessories, Cars, Bikes, Boats. (end time 21-Jul-10 22:54:06 AEST)

BRAND NEW HIGH REV RACING CDI UNIT DIRT BIKE THUMPSTER - eBay, Bike Parts, Motorcycle Parts, Accessories, Cars, Bikes, Boats. (end time 28-Jul-10 00:23:14 AEST)

Thanks guys.

 

[topguntravis]

Is a CDI basically like a performance chip like you can put in cars?

 

[turbotobes]

Is a CDI basically like a performance chip like you can put in cars?

i think that they re map the power curve and eliminate the rev limiter

 

[dub_88n]

Is a CDI basically like a performance chip like you can put in cars?

i agree, all they really do is change the voltage to the engine at different revs, and helps provide the maximum power out put... <<< dumbed down a bit hope this helps tho

 

[topguntravis]

Yeh that's what I was thinking it did along those lines

 

[sean01]

they change the advance curve of the ignition...
meaning it will be advanced higher at idle and up top.. some of these cdi's make for a kick back junkie engine.. be careful...

as for tuning, they dont do a real lot but maybe you could trial a larger main jet (1 or 2 sizes bigger)

they dont do anything for the rev limiter because there isnt one to start with..

 

[turbotobes]

Is your 140 stock mate coz there are much better performance parts than a cdi like a carby, exhaust,cam shaft ect ect you won really notice much a diff with just cdi

 

[sean01]

oh i forgot to ask if the motovert140 has an irk factory fitted?

 

[psyeap]

turbotobes - yeah it's stock mate. it came with race cam and when I bought it. Haven't done any upgrades yet. Might just have to get other performance parts as you've mentioned above instead of just the cdi. damn that's gonna cost. hahaha. Cheers mate.

sean - nah, it doesn't have an irk fitted.

 

[Barnesd09]

If your looking along the lines of a cdi, I'd be going for something from the CF Posh range like a Mega Battle, Super Battle or thier top of the line Programable one Mega Light. Or even a Daytona Programable one.
Otherwise, you wont notice anythign really and your money would be better spent on other things.
Check out the link to see what I mean http://www.ka-ha.de/mm-parts(new)-posh(electric).html

 

[psyeap]

hi barnesd09,
thanks for the info. will definitely check it out. i was also lookinga t the vortex programmable cdi but it's way too $$. something like 400-500 bucks for 1.

 

[turbotobes]

yeah mate i would get a carby first go an oko 26mm flatslide so many ppl use them and will be able to help you with the jetting there are threads to have a look at with heaps of info on them man. then get a good exhaust

 

[fusedminis]

Than your going to freak when you look into that link, the ones barnes is talking about will run you more than the vortex. Personally I wouldn't worry about a cdi if at all till you get a few other modifications such as porting, hc piston, bbk, exhaust, cam, blah, blah blah.
Maybe you should look into getting an outer rotor kit, they come standard with a cdi which you can change the curve on. Just a thought.

 

[psyeap]

yeah i might just do that first, get some other mods before the cdi. no use getting the cdi first if it's not gonna do much. after all you guys probably know way more than I do. i'm still learning. might even look at the outer rotor kit and carby which turbo recommended. cheers guys.