Wanted - MC5 250 exhaust pipe

[454MRW]

No one is changing any gaskets the manifold is the manifold for that cylinder it would have been factory on that cylinder and it should stay on that cylinder with the same style gasket, unless he uses the other type manifold with the 77 MC5 style pipe which might require a little Port matching. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

[Larry Perkins]

Plain and simple Mike you were wrong when you said they were the same.  Just own up to it and let it go.  Trying to explain does not change what I said or what you said.  It is in print and wrong is wrong!  The 175 manifold not fitting the 250 pipe as well makes a small difference in performance.  That small stuff makes a different sometimes on the track.  I realize from your perspective it matters not if you are just running it up and down in a field.

Larry P

[454MRW]

I'm just trying to help from the experience that I have doing the same type of thing that Bob is. I'm not sure what you're trying to do.  Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

[Larry Perkins]

I was just showing that you were saying I was wrong and you were incorrect.  Don't try to correct someone if you are wrong, it is that simple.  I don't expect you to actually admit it but it is in black and white.  I have seen you do this before when you were not quite on target and never said anything but this time you did it to what I said and I will weigh my experience with these bikes over 35-40 years and the thousands of races I have had on them against yours anytime.  Nuff said!

Larry P

[Dale Fisher]

Enough!  Let the buyer and potential seller work out the details in this special request/application.  I'm sure there is some expectation by Bob that this is not a bolt on and go transaction.


Dale Fisher
Penton Owners Group - President/Memberships
POG Merchandise
Mudlark Registry
Facebook - Penton Owners Group - Administrator
Facebook - Cheney Racing Group - Administrator

[Larry Perkins]

It was already over Dale.  The point was made and Bob does understand, I am sure, there is some modification necessary.  My initial question to HIM was only to make sure he knew that and then it became something else. When someone says I am wrong and I am not or contradicts what I know to be true I will Always speak up.  This is especially true if that guy just a week or so back texted me repeatedly climbing up my ass telling me I should have bought a different bike than I did because he would have gotten paid to go get the other bike.  So please don't try and jump on me as I said Nuff said and was done.

Larry P

[Dale Fisher]

You don't seen to understand Larry.  You are not the buyer or seller.
 Please no further comments on this post.

Dale Fisher
Penton Owners Group - President/Memberships
POG Merchandise
Mudlark Registry
Facebook - Penton Owners Group - Administrator
Facebook - Cheney Racing Group - Administrator

[Larry Perkins]

You don't seem to understand Dale.  In trying to help Bob I asked a simple question not knowing if he was aware of the fact that the manifolds were different and then someone else said they were the same and that was debated. Now you try to jump me about it and you are off base.  Plus you jump me and only me about it after I said I was done with it.  At least be fair about it. Perhaps you for some reason don't wish to be fair?  I am done with iot.  All that is going on now is me defending my right to ask a question and defend my point of view and not be told to shut up.

Larry P

[skiracer]

My 76 has loop washers not tabs.....

quote:Originally posted by 454MRW

The only difference I have seen are the number of tabs welded to the manifold, I have seen 1 or 2, or whether there are tabs to hold the Springs to the manifold, or if small loop washers bolt to the manifold to hold the springs. The manifold size and how it mounts up to the cylinder are the same on the ones I have had. It is possible that some years are different. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

1976 MC 5 Original Owner
1982 Suzuki PE 175
1976 Penton 175 XC
1985 20' Hi Point trailer

[Larry Perkins]

I guess you are knowing the manifold is a different size?

Larry P

[454MRW]

The earlier 7 fin is the same as a 250. Let me look in the shop and see what I have. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

[454MRW]

Bob, I actually installed a 77 style MC5 175 MC5 pipe in a 76 MC5 125 chassis with an old-style (1975) 7 fin engine at one time. In order to get that to fit I had to grind some fins from the head and use the 77 6 fin style aluminum finned exhaust manifold. Bear in mind the exhaust manifold where it matched up to the cylinder was a smaller opening than the cylinder port and I would have had to open it up to match the port with a due grinder, if I had completed that application, however the 77 GS6 250 has one like it that has a larger opening, but it would not fit the 77 MC5 pipe diameter. With that said, I do have a MC5 pipe I will send you some pics to your phone. This pipe would require the angled downward 250 standard style manifold. I have only seen a few early MC5 pipes that have used the straight manifold like on the 7 fin 175 engines. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

[Larry Perkins]

I believe the manifold size of the 175 and the gasket are not the same size as a 250.  Different part numbers also.  I don't believe if they have different part numbers that they would be the same. Bolting up and the same are two different things.

Larry P

[454MRW]

The only difference I have seen are the number of tabs welded to the manifold, I have seen 1 or 2, or whether there are tabs to hold the Springs to the manifold, or if small loop washers bolt to the manifold to hold the springs. The manifold size and how it mounts up to the cylinder are the same on the ones I have had. It is possible that some years are different. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1978-1979 MX-6 175 & 250 KTM's
1976-78 125-400 RM's & 79 PE250 Suzuki & 2012 DR650
2007 CR125R Honda
1977 MC250 Maico

[Larry Perkins]

The size of the opening is different.  You can see that in the two different gaskets.  The bolt pattern is the same but the internal hole is different.  Hold the gaskets up to each other and you will see this.  Thus different part numbers.  Part numbers have been different for all years.

Larry P