MC5 400 Rear Engine Mount Removal

[George Swan]

Rookie question... how do I get the studs out to remove the engine. It is the mounts right below the swing arm. I figure better to ask a stupid question among friends whom done it before than get a bigger hammer... [B)]

1976 Penton MC5 400 Frame # 1871

[Doug Knight]

Remove nut from left side, may have to use a drift to drive it out to the right side. Can be packed with dirt and corrosion. Go easy as you will need the long bolt. My '73 and '75 were both caked in crud.

[George Swan]

So you are saying it just drifts out... what is throwing me off is there appears to be a nut shaped spacer between the frame and engine. I didnt want to break anything trying to drift it out.

1976 Penton MC5 400 Frame # 1871

[Daniel P. McEntee]

That spacer that you described does screw into the case, and the bolt passes through it. On my recent barn fresh project bikes, I used liberal amounts of penetrating oil, soaking it for a while forst, then worked the bolt back and forth from side to side to help work it in. As mentioned before, gunk works it's way into case and makes it sticky. A soft metal drift, lots of small taps with a hammer and patience is the key!
   Good luck and have fun.
  Type at you later,
   Dan McEntee

[454MRW]

That is the bolt that passes through the swing arm, if you are referring to the chain roller mount, just loosen the nut and the roller mount can be slid off the stud, as long as the swingarm bolt is loose, as it is slotted for removal. Mike




Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S
1975 Can Am 175 TNT & 77 250 Black Widow
1979 Husqvarna OR390
1976-78 RM & 77-79 PE Suzuki's
1974 CR250M 07 CR125R 79 CR250R

[George Swan]

No it goes through the motor... going to take Dan and Doug's advice and lightly start working it. I didn't even attempt to remove it yet because I was worried there was a trick. The spacers really threw me off. Looks like I can have the frame at the blasters by early next week...

1976 Penton MC5 400 Frame # 1871

[George Swan]

Success the engine is out... it was not easy or fun but its done. Teardown is officially done!!!

1976 Penton MC5 400 Frame # 1871