2010 Magnum question on CDI By parsonsj11 (Read 874 times)

[parsonsj11]

Hi have a 2010 300cc Magnum I've been working on since I got it... LOL Does anybody have the wiring information for the CDI... have low RPM's at Max throttle and really slows down on Pa Hills. I wanna get a CDI for it to try... have done valve adjustments and carb and all. next things to try is variator, clutch and cdi.. runs ok on the flats but still low rpm"s.... it needs to get to 7000 at least for power-torque.... when driving around never gets over about 4000...

[Alleyoop]

What is your top end speed?? It should cruise around 60 all day long.
The weights are probably to heavy, so take the Variator off and weigh the weights.
Alleyoop

[parsonsj11]

I already changed out to mid weight sliders if memory serves they are 12g. i'm gonna try heavier clutch spring too.. if I have enough flat miles I can get it up to 60. lol if I go up a hill it drops down to 30 or so by the time I get to the top rpms never get above about 4000. that's why i'm thinking the cdi is choking rpms below the power curve.....

[tvnacman]

I would open the variator and check that the sliders did not come out of place . I would also check for free movement of the variator . While you have it opened check the clutch slide pulley .

John

[Alleyoop]

Normally on the 150+ motors they do not put a Rev-Limited CDI in only on the 50ccs to keep them in the 30mph range. But never say never it could be a bad CDI.
Alleyoop

[mike6736]

I just sold my 300 2010 Magnum and I found the best rollers are 12g and 13 g I think is what is in it now. Sure sounds like it is valves, I find they run better at .004 intake and .005 exhaust, I also see you said you did the valves.

Magoo

[parsonsj11]

well everybody has good comments. unfortunately I've done all of the suggestions so like I said its time to change out some stuff.. lol

and alley one Capsiter goes screwey in there and there goes ur curve..... I hate things that are potted closed where u cant work on them.....

I still have the original question about the wiring of the cdi.. don't wanna get one and have it wired different.. ZAP!!!!

And those things run on smoke.. if u let it out no workie anymore......

stronger clutch spring - cdi maybe some carb jet changes .. been working on it for 3 years now and only got about 400 miles on it.....


Gonna get there one of these days.....
Looking at a trike kit for my Hyosung GV250 that I can't ride since my Quintuple heart bypass.....

[tvnacman]

What type cdi were you interested in ?

I hope you opened the cvt and checked it out .

John

[mike6736]

parsonsj11, hope you get it the way you want it took me some time. My CDI went also and I got one at a local shop, just take that one with you to a local shop that sell chino scoota/atvs and I think about 30 bucks and they will match it up. I think nine had about 4,500 miles on it when I sold it. If your doing 60mph you are churning well over 4,000rpm more like 6,500 to 7,000rpm
Magoo

[kalee]

Hey Mike i see you finally sold your magnum
kalee

[parsonsj11]

hey Mike

I got a computerized speedo - tach on board.. gets to 60MPH IF I have enough of a flat run. LOL The rpms don't go above about 4000 . i'm guessing if I got out to Bonneville it could get to 80 or 90MPH.
I'm gonna try a new CDI just to check. also gonna go for carb main jet changes and heavier clutch torque spring the stock one on it only has 90 lbs. the lightest sliders are 12g and I think I need at least 120 - 140Lbs. on torque spring to get the gearing working right.. might go with new air filter and open muffler baffle a bit too..

One of these days. it's gotta work right enough to be comfortable riding it.

[mike6736]

LOL...Good luck there parsonsj11... Than you can ride with the big boys if your Magnum will do that.

Kalee yes I sold the Magnum a week or so ago. Tell yo0u the truth I miss it when I go out to the Honda Cave...LOL

Magoo

[tvnacman]

Aug 20, 2013 20:35:36 GMT -6 parsonsj11 said:

hey Mike

I got a computerized speedo - tach on board.. gets to 60MPH IF I have enough of a flat run. LOL The rpms don't go above about 4000 . i'm guessing if I got out to Bonneville it could get to 80 or 90MPH.
I'm gonna try a new CDI just to check. also gonna go for carb main jet changes and heavier clutch torque spring the stock one on it only has 90 lbs. the lightest sliders are 12g and I think I need at least 120 - 140Lbs. on torque spring to get the gearing working right.. might go with new air filter and open muffler baffle a bit too..


Did the tachometer acme instructions some of the tachometer can be used for. Engines with more than one cylinder. Remember your engine fires on every rotation of the crank. Could you be in the wrong setting on the tachometer. I did this with the tiny tachometer. I thought I was idling at 2400 rpm and maxed out 4500 rpm. My rear wheel was not moving on the center stand. Then I figured out I had the tachometer in the wrong setting.

John
One of these days. it's gotta work right enough to be comfortable riding it.

[tvnacman]

When I figured out the tachometer, my idle was about 1100 rpm. I pushed my idle till the rear wheel would just want to spin on the stand. The rpm was 1800 rpm, with the tachometer in the wrong setting it was about 3500 rpm.

John

[parsonsj11]

Ya I went through the same thing when I Put computer on it 2 years ago..... too many different settings on some of them.. lol

And the ICE Bear brand isn't on anybody's list of how to set up. and they use such a hodgepodge of parts u never know what u need....