I'm loving my MC28 I restored, but a few weeks ago I overtook a car accelerating to full speed. I overtook a car then shortly after the bike bogged down and only firing on one cylinder. It wasn't seized. I've seized my RGV (Vj23) enough times to know what that sounds like.
So I limped the bike back home for 5 miles on one cylinder and it was really slow.
The plugs are new with the restoration and have done about 200miles.
I took the plugs off and the left(rear)plug was really wet. Sparked when I kicked it and held plug against head
The right plug was quite sooty. Sparked when I kicked it and held plug against head
As I imported the bike direct from Japan I don't know the history but its really fast. Much faster than my VJ23.
The pipes when I first removed them last year for restoration were totally coked up.
With the pipes off I looked up into the barrel and the honing on the barrel looks brand new. Same with the sides of the pistons I could see.
The engine does feel beautiful and tight, and has loads of torque so I'm wondering if the previous owner had a rebore + new pistons and maybe some tuning work.
It's got the standard smartcard and not some fancy HRC one. It'll do 105mph no problem and probably faster.
So does anyone know what size jets are best for the NSR250 MC28?
I get the feeling its jetted really rich
I'm going to try kicking it over with the pipes back on today and a fuel bottle feed.
Am I going to need a plug chop? I've never done one before.
Cheers for any help.
Rich
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