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Author Topic: Installing new ESR CEO 350 top end  (Read 8313 times)

Offline The norm

Re: Installing new ESR CEO 350 top end
« Reply #15 on: January 27, 2022, 07:17:15 AM »
I know as soon as I started running a cr ignition on my 391 it fixed a lot of what I thought was tuning issues.  The 391 ruined 2 flywheels some how? Not sure if the magnets were already falling apart and the bigbore power finished them off or if they both suffered an instant catastrophic failure. Have you tried another oem cdi?
What are you running carb and jet wise? I went with Pete's jetting starting point advice but ended up going fatter on the main.
Loren
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline Michael88R

Re: Installing new ESR CEO 350 top end
« Reply #16 on: January 27, 2022, 10:14:12 AM »
I haven’t tried another cdi.  I was just trying to break-in.  I really only opened it up on one short ride.  I have 38 pwk AS.  Went with Eddie’s recommendations.  48 pilot, dgh 4th pos, and 190 main.
88’ R Esr 350 CEO, Esr trx5 pipe
88’ R Esr ported stock cylinder, waiting for rebuild when my son gets a little older

Offline ajbuilder250r

Re: Installing new ESR CEO 350 top end
« Reply #17 on: January 31, 2022, 11:06:47 PM »
my hunch is that it was bogging on the face of the dune because the 190 main was way too fat

Offline Michael88R

Re: Installing new ESR CEO 350 top end
« Reply #18 on: February 01, 2022, 12:22:49 AM »
I’ll try a 185 next time. 
88’ R Esr 350 CEO, Esr trx5 pipe
88’ R Esr ported stock cylinder, waiting for rebuild when my son gets a little older

Offline hickwheeler

Re: Installing new ESR CEO 350 top end
« Reply #19 on: February 01, 2022, 10:21:49 PM »
I would think you are rich. I run 185 or 182 with a 41.5
88 hybrid 431 puma
88 (BOF Build) stock motor and oem 89 plastics
More in the works

 

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