|
|
Post by bvulic1 on Jun 27, 2018 22:57:49 GMT -5
Anyone have any experience with restriction removal on the CPI Oliver City ?
I have so far taken the washer out of the variator , tuned it properly with a proper size main jet and new air box. Original equipment was restricting.
I also installed slightly lighter roller weights. It feels like it has a lot of zip in it when accelerating however it feels like something is holding it back electronically. It seems as if there’s a rev limiter on it. From what I’ve read , the CDI itself is not restrictive. Anyone that has any info on the Oliver City specifically , I would appreciate it ! Thanks.
|
|
|
|
Post by 190mech on Jun 28, 2018 3:40:57 GMT -5
I have a CPI CDI that does have an internal rev limiter..I tested it many times on my iggy test machine and it shuts itself off at 9000 rpm's every time...
|
|
|
|
Post by bvulic1 on Jun 28, 2018 8:31:05 GMT -5
I have a CPI CDI that does have an internal rev limiter..I tested it many times on my iggy test machine and it shuts itself off at 9000 rpm's every time... 190mech that is exactly what it feels like. You explained it perfectly. It seems the scooter has enough power to fly however its as if something is holding it back.
Any insight as to where this electronic rev limiter is? From what i've read there is something in the cvt cover however I took it apart and did not notice anything out of the ordinary. It is a horizontal minarelli so I am pretty used to everything in there. I'd appreciate any pointers on how to rid it of this electronic limitation.
|
|
|
|
Post by 190mech on Jun 28, 2018 11:52:58 GMT -5
Its INSIDE of the CDI unit,must install an unlimited CDI unit..
|
|
|
|
Post by bvulic1 on Jun 28, 2018 13:40:22 GMT -5
Its INSIDE of the CDI unit,must install an unlimited CDI unit.. Its weird because I've read conflicting ideas numerous times. I've heard that it isn't the CDI unit itself but rather some sort of clutch RPM restriction. Its very hard to find an unlimited CDI for the Oliver City. |
|
|
|
Post by 90GTVert on Jun 28, 2018 14:20:59 GMT -5
190 made an actual test rig to check CDIs and see exactly what they're doing and you said he described it perfectly, so I'd go with what he says and replace the CDI. There are some systems out there that monitor speed of the clutch bell or rear pulley to limit speed, but those would be easy to spot because you'd have a sensor and wire back there. They aren't really common and I'm not sure that CPI ever did it. If it were a restriction in the CVT it couldn't really limit RPM unless it were a really soft spring or heavy weights to keep it down. Even then, you could go downhill and it would want to rise. Only the ignition is going to put a limiter on RPM at an exact point like 9,000RPM and the only ignition component on scoots that would do that is the CDI, so we're back to what 190 said. If you want a quality replacement, Malossi makes a CDI that is similar to the good CPI CDIs, just with a touch more advance. It's part number 55 8133. Some of the generic stock replacements are pretty close too, but you can't be sure of what you're getting.  |
|
|
|
Post by 190mech on Jun 28, 2018 14:24:32 GMT -5
Ive heard the limited CDI was not normal for CPI's,but I sure have one on my work bench!I got the "blue racing" CDI which is a flat liner(no curve) and set it at 15 degrees BTDC.There may be better stuff out there now though..There were some scoots that had a sensor mounted in the CVT cover that read RPM's and would limit the CDI,but I dont think CPI ever used that set up..
OOPS! Brent just answered it all when I was typing!!!
|
|
|
|
Post by 190mech on Jun 28, 2018 17:00:35 GMT -5
|
|
|
|
Post by bvulic1 on Jun 29, 2018 9:00:19 GMT -5
190 made an actual test rig to check CDIs and see exactly what they're doing and you said he described it perfectly, so I'd go with what he says and replace the CDI. There are some systems out there that monitor speed of the clutch bell or rear pulley to limit speed, but those would be easy to spot because you'd have a sensor and wire back there. They aren't really common and I'm not sure that CPI ever did it. If it were a restriction in the CVT it couldn't really limit RPM unless it were a really soft spring or heavy weights to keep it down. Even then, you could go downhill and it would want to rise. Only the ignition is going to put a limiter on RPM at an exact point like 9,000RPM and the only ignition component on scoots that would do that is the CDI, so we're back to what 190 said. If you want a quality replacement, Malossi makes a CDI that is similar to the good CPI CDIs, just with a touch more advance. It's part number 55 8133. Some of the generic stock replacements are pretty close too, but you can't be sure of what you're getting. Thank you both for the info. Looking up the Malossi unit, it seems to be a great idea however the current CDI does not seem to have the same connectors as the Malossi unit. The current cdi is the one 190mech sent in the above post. Any easy way to fabricate it to work? |
|
|
|
Post by ThomasTPFL on Jun 29, 2018 10:11:16 GMT -5
For that kind of thing you have to study the wiring diagram for the bike and the pin out on the box you're using and then make sure everything gets hooked up correctly. I prefer making a pigtail sort of thing to plug in between the factory plug and the CDI to hacking into the factory harness.
|
|
|
|
Post by 90GTVert on Jun 29, 2018 10:20:56 GMT -5
I use CPI CDIs regularly and like them, but mine don't look like that "evil" restricted unit that John posted. They look basically like the Malossi and have connectors that match it like most of the 2Ts do.
It's not that tough to adapt a CDI. In this case, I'd actually change the stock harness to match the new CDI because the new CDI is what the vast majority of these use for connectors, but that's your call. We should be able to help you match up whatever CDI you end up with if you give us pics of it's connections/wires and show us what your stock connections are.
|
|
|
|
Post by 190mech on Jun 29, 2018 19:23:13 GMT -5
|
|
