Aftermarket cdi's? Avoid like starters or viable?

bored&stroked

bored&stroked

Urban redneck
Location
AZ
Can't find a decent used 62t CDI right now. Don't have $300 for a new one. See aftermarket new replacements available these days. Anyone take the chance and run one yet?
 
bored&stroked

bored&stroked

Urban redneck
Location
AZ
While this wasn't a WTB thread I did get one offered in private that I took him up on. Still curious if anyone esle tried the aftermarkets for future reference though.
 
Pro-pulsion

Pro-pulsion

Location
Ontario, Canada
I gave up on aftermarket units. I tried MSD 3x in a row and 3x they failed miserably, one was brand new even. I tried an older Advent, it was dead on arrival and I later found out that it was of a serial number range known to cause severe backfiring to the point of exploding the bendix and cases. This info came straight from Advent. I gave up at that point. I have gone through 3 OEM units in the 8 or so years I've owned my SJ, when they can be bought for as low as $40 in known good condition I'll take that gamble. MSD sells used for sometimes as low as $150 but have such a horrible record for reliability that it could grenade on the first install to your ski. My last one puked on the third run just after installing it. I'll stick with stock and hope to afford a Zeel someday.
 
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wmazz

wmazz

Location
Riverside, CA
mikesx said:
I got 3 seasons on an ebay $60 aftermarket ( no rev limiter, non adjustable). No problems.
https://www.ebay.com/itm/CDI-Module...242502&hash=item41d982a80b:g:HnAAAOSw301aabHh
Click to expand...

You might see "No Rev Limiter" as a feature, but when DB @ ProTec first
started modifying Yamaha rev limiters, he removed the rev limiter. DB (ProTec)
was also racing at the time and the cdi's with no rev limiters were snapping
off the nose of the crank.

Then he started using a mod to make the rev limiters adjustable with a max
9000rpm rev limit. This mod fixed the crank breaking problem.

The cranks broke in 2 different places. The entire nose @ the crank web, in
between the web and main bearing. The other was the big end pin of the
front cylinder con rod.

I have seen the same crank failures on MX and Street bikes.


Bill M.

There is no doubt the new cranks are better, but I still see it as a possibility,
and I didn't mention careless wave jumping or rebuilt cranks with Chinese
connecting rods with no rev limiter :(
 
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M

mikesx

wmazz said:
You might see "No Rev Limiter" as a feature, but when DB @ ProTec first
started modifying Yamaha rev limiters, he removed the rev limiter. DB (ProTec)
was also racing at the time and the cdi's with no rev limiters were snapping
off the nose of the crank.

Then he started using a mod to make the rev limiters adjustable with a max
9000rpm rev limit. This mod fixed the crank breaking problem.

The cranks broke in 2 different places. The entire nose @ the crank web, in
between the web and main bearing. The other was the big end pin of the
front cylinder con rod.

I have seen the same crank failures on MX and Street bikes.


Bill M.

There is no doubt the new cranks are better, but I still see it as a possibility,
and I didn't mention careless wave jumping or rebuilt cranks with Chinese
connecting rods with no rev limiter :(
Click to expand...
Good info. I only gave these a shot after getting 2 brand new MSD’s DOA right from MSD and being told that I was hooking them up wrong. So obviously I’m too stupid for MSD and their wonderful perfect product. And I was too lazy to mod an oe. When my buddy had his Epic fail he popped one in “temporarily “ 2 seasons ago. Make spark go kind of situation. I got mine on a +15 seasons 61x that don’t owe me a dime so risk/ loss ratio is low. If safety is a concern they have rev limiter versions @ same price point.
 
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