ninjette.org - View Single Post - Newgen motor in a Pregen Frame

ZZRIvy · July 1st, 2016, 03:49 AM

Hi all, this is a great forum I have been reading for a while now and would like to ask about this engine swap.
I have a ZZR250 in the UK and was considering fitting a post '08 motor but after reading all the specs I see the newgen motor has a different ignition timing curve. i.e. the pregen has a fair bit more advance.
I can't remember the exact difference but it was significant.
I found the specs. again, preden advance = 42 degrees at 4500 rpm. newgen advance = 38 degrees at 6000 rpm
Is this going to be problem? How do your bikes perform with a newgen motor running with a pregen CDI etc.
Thanks for any help you can offer.

Ivy.

July 1st, 2016, 03:49 AM	#37
ZZRIvy ninjette.org newbie Name: Ivy Location: Devon, England Join Date: Sep 2012 Motorcycle(s): Several Posts: 5	Hi all, this is a great forum I have been reading for a while now and would like to ask about this engine swap. I have a ZZR250 in the UK and was considering fitting a post '08 motor but after reading all the specs I see the newgen motor has a different ignition timing curve. i.e. the pregen has a fair bit more advance. I can't remember the exact difference but it was significant. I found the specs. again, preden advance = 42 degrees at 4500 rpm. newgen advance = 38 degrees at 6000 rpm Is this going to be problem? How do your bikes perform with a newgen motor running with a pregen CDI etc. Thanks for any help you can offer. Ivy. Last futzed with by ZZRIvy; July 1st, 2016 at 04:50 AM. Reason: More info.