1978 MC5 Air Boot

[454MRW]

Did you look on Al Buehners site on the suppiers page? He has the most common one listed as a 77 125-175 boot for $40, which in all reality should be listed as 125-400 with Bing carb, and may be the one you are referring to. Mike


Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[Tom McPeek]

The boot Jeff is referring to is for the 78 Only it appears  Part# 55 06 026 500 for the different shaped (plastic)air box than the 77's (Aluminum)   The one on Al's site is for the 77 125-175 Part# 51 06 026 100  or the 250-400 one Part# 55 03 026 000   I have personally  experienced this issue being that Jeff has my old bike and I have bought a 77 MC5 which requires a diff boot # 54 06 026 500 for the GS type carb setup on mine (figure that out )  All in All very confusing to say the least.    Anyone have a rear backing plate for the 77 that isn't all wobbled out at the brake arm pivot ?

78 KTM250 MC5,77 Penton 250 MC5

[dennis foley]

jeff, check out, //www.vintagedirtbikeparts.net, click on air boot page , go to page 2. my 78 mc5 250 took the air boot on the left.

[454MRW]

Here is a better ling to page 2 of that listing. I knew someone had mention a more affordable place to get the boots, but I couldn't find the post. Mike
http://vintagedirtbikeparts.net/airboots2.htm

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[dennis foley]

i just tried to go to click on the link. it does not work. i just googled  it and it works that way.

[Jeff Vlk]

I will post a pic later of the air boot.  It is not the same as any listed or pictured on the vintage dirt bike web site.  I believe it is only for a 1978 250 MC5.  When you see the pic you will understand.  I have the longer one on the bike now but had to cut it down almost to the taper.  Makes it hard to put on and it bunches up a little. Getting back to my other question, how many 1978 250 mc5 have been made?  If I have these remade who would be interested in getting one.  

Jeff

[454MRW]

Did you look on Al Buehners site on the suppiers page? He has the most common one listed as a 77 125-175 boot for $40, which in all reality should be listed as 125-400 with Bing carb, and may be the one you are referring to. Mike


Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S

[Tom McPeek]

The boot Jeff is referring to is for the 78 Only it appears  Part# 55 06 026 500 for the different shaped (plastic)air box than the 77's (Aluminum)   The one on Al's site is for the 77 125-175 Part# 51 06 026 100  or the 250-400 one Part# 55 03 026 000   I have personally  experienced this issue being that Jeff has my old bike and I have bought a 77 MC5 which requires a diff boot # 54 06 026 500 for the GS type carb setup on mine (figure that out )  All in All very confusing to say the least.    Anyone have a rear backing plate for the 77 that isn't all wobbled out at the brake arm pivot ?

78 KTM250 MC5,77 Penton 250 MC5

[garrettccovington]

This is the one I have.

G

72 six-day
79 KTM MC80 250

[garrettccovington]

AT the Vintage dirtbike parts page, I guess mine is the one on the right.

G

72 six-day
79 KTM MC80 250

[Tom McPeek]

Garrett  That is the boot that my 77 MC5 needs  My carb is almost in my airbox and offset.

78 KTM250 MC5,77 Penton 250 MC5

[garrettccovington]

This is off my 79KTM MC80 250cc, Its dry rot pretty bad. But I'm really not sure what my bike really is.  Vintage Dirt Bike parts .net calls this part a 80-81.  The Serial numbers on the engine and frame say it is a 79, but there has been some stuff that leads me to believe it could be a  78 bike.  Kinda reminds me of that Johnny cash song. where he takes 1 part out of the factory and has a 74, 75, 76, 77, 78,79,80 and 81 Penton/KTM 250.

G



72 six-day
79 KTM MC80 250

[garrettccovington]

What I am using right now is a UNI Dual stage  "tube/sock" airfilter until I get all the parts to make my airbox/airfilter complete.
The uni filter has a hard rubber flange that hose clamps onto the carb perfect.  I backfeed/snake the airfilter/carb assy thru the airbox until the carb will fit on the intake manifold.  Be careful not to kink the throttle cable.  I was at Terrycable this morning getting a new one.  If you go this route you have to get the 6 inch long one. the shorter one doesn't allow enough air for the motor.  It actually works pretty good out here in the desert.  

  My 72 6-day cage and no-toil airfilter fit perfectly in the 79whatever airbox, just need the airboot and need to make a little holding rod.

G

72 six-day
79 KTM MC80 250

[Jeff Vlk]

Here is a pic of what I am looking to have remade.  The part # is molded right in the side of it, 55.06.026.500 . In my KTM parts book this shows to be the right one for the 1978 MC5 250.  Does anyone want to have this made or do they have any to sell.  Jeff
 440-479-3905
http://i835.photobucket.com/albums/zz280/hotshoe943/airboot002.jpg

http://i835.photobucket.com/albums/zz280/hotshoe943/airboot003.jpg

http://i835.photobucket.com/albums/zz280/hotshoe943/airboot001.jpg

[454MRW]

Jeff,
What manual are you looking at? Can you send a pic of the front cover of the manual. That boot looks like one I had for a 81 250, but I don't have an 81 manual. My MC5/78 manual depicts the boot like I posted for that same part # on page 10, and no boot like you have is even depicted in my 78, 79 or 80 manuals that I have been able to find, although the one Garrett posted is shown in the 79 manual without the angle from what I can tell. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S