1978 250 pipe

[Mike Korgan]

Has any one who has changed their 77 mc5 pipe for a 1978 mc5 "torque pipe" required re-jetting? If so, how much change did you make?
Thanks,
Mike

[Larry Perkins]

Gary Ellis has experience in that area and I think Mike Winter too.  They should be able to help.  My thought is not but never did it.  No seat of the pants experience for me on that one.

Larry P

[454MRW]

My 78 mc5 250 had a Mikuni carb but I did use a Circle F 78 style torque pipe previously on a 77 MC5 250 with a stock Bing 36mm, and it ran just fine. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Penton
1976 MC5 400
1978 KTM 78 GS6 250
L78-79 MX6 175-250 KTM's
1976-78 125-400 RM's
2007 CR125R Honda
1977 MC250 Maico
2017 KTM Freeride 250R

[skiracer]

I have one on my 76 MC 5 250.  I run a Lectron carb, and did not have to change any of my settings.....

1976 MC 5 Original Owner
1976 Penton 175 XC

[G Ellis]

Each bike is different, but most of the time no jetting changes.

[Mike Korgan]

Thanks everyone.
Mike