Anyone know the difference between these 2 pistons? I need a new one for my 1963 Monza. I think these are the higher CR jobs. Not sure I want to raise the CR on the bike with a known kick starter problem.
Ducati 250 4T Mark 1966
Ducati 250 4T Scrambler 1966-69
Found here in Italy,
http://www.ebay.it/itm/PISTON-PISTONE-C ... d90&_uhb=1
How to free a seized motor
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DewCatTea-Bob
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Re: How to free a seized motor
[quote= tobydmv ...
" Anyone know the difference between these 2 pistons? "
____ I only saw the one (4-stroke type) pictured -("Ducati 250 4T Mark 1966"). _ It appears to be the 9.8:1 version as intended for 1965 & newer Mark-3 models.
" I need a new one for my 1963 Monza. "
____ I still have a few NOS 8:1 250-Monza pistons in stock ! _ What bore-size do you prefer ?
" Ducati 250 4T Scrambler 1966-69 "
____ That should be '1967-70' ! _ And I believe that p.model has a 9.5:1-CR.
(The 1961-66 250Scr. is 9.2:1 .)
Duke-Cheers,
-Bob
" Anyone know the difference between these 2 pistons? "
____ I only saw the one (4-stroke type) pictured -("Ducati 250 4T Mark 1966"). _ It appears to be the 9.8:1 version as intended for 1965 & newer Mark-3 models.
" I need a new one for my 1963 Monza. "
____ I still have a few NOS 8:1 250-Monza pistons in stock ! _ What bore-size do you prefer ?
" Ducati 250 4T Scrambler 1966-69 "
____ That should be '1967-70' ! _ And I believe that p.model has a 9.5:1-CR.
(The 1961-66 250Scr. is 9.2:1 .)
Duke-Cheers,
-Bob
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PLEASE NOTE... If this-post is not-yet signed-off with '-Bob', then I'm still in the process of completing it,, and if not also included with 'DCT' near bottom as well, then I may edit this post's wording at a later time. - Dct.Bob
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tobydmv
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Re: How to free a seized motor
Bob, i'd love one of those in 2nd OS or higher. Can you send me a PM offline or an email?
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DewCatTea-Bob
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250-piston Concerns
[quote= tobydmv ...
" i'd love one of those in 2nd OS or higher. "
____ I'm left assuming that you're meaning an 8:1-piston meant for a Monza ?
__ The original-type 'Borgo' pistons had a 2nd.oversize of 74.6mm, however I have very-few Borgo-brand pistons and only recall having a 74.4 version left.
The aftermarket-pistons which I still have a number of over-sizes in, rather come in .25mm increments (instead of .2mm),, so I'm fairly sure I still have 74.5 & 74.75mm sizes nearest your specified OS.range, (not to mention 75.0 & 75.25mm, as well).
__ Last time I was actively selling these,, I sold a few 74.25/1st.OS 8:1-versions for $125 each, on eBay back in 2010. _ I stopped listing them mainly because most were selling to countries outside the USA, and it wasn't really worth my trouble.
What country would you want your shipment sent to ?
" Can you send me a PM offline or an email? "
____ I really don't care to mess with taking PMs anymore, so please send emails to: bobhansn.5-1948 @ netzero.com .
Hopeful-Cheers,
-Bob
" i'd love one of those in 2nd OS or higher. "
____ I'm left assuming that you're meaning an 8:1-piston meant for a Monza ?
__ The original-type 'Borgo' pistons had a 2nd.oversize of 74.6mm, however I have very-few Borgo-brand pistons and only recall having a 74.4 version left.
The aftermarket-pistons which I still have a number of over-sizes in, rather come in .25mm increments (instead of .2mm),, so I'm fairly sure I still have 74.5 & 74.75mm sizes nearest your specified OS.range, (not to mention 75.0 & 75.25mm, as well).
__ Last time I was actively selling these,, I sold a few 74.25/1st.OS 8:1-versions for $125 each, on eBay back in 2010. _ I stopped listing them mainly because most were selling to countries outside the USA, and it wasn't really worth my trouble.
What country would you want your shipment sent to ?
" Can you send me a PM offline or an email? "
____ I really don't care to mess with taking PMs anymore, so please send emails to: bobhansn.5-1948 @ netzero.com .
Hopeful-Cheers,
-Bob
PLEASE NOTE... If this-post is not-yet signed-off with '-Bob', then I'm still in the process of completing it,, and if not also included with 'DCT' near bottom as well, then I may edit this post's wording at a later time. - Dct.Bob
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tobydmv
- Posts: 88
- Joined: Wed Apr 16, 2014 4:59 am
Re: How to free a seized motor
Bob, email has been sent. The Borgo 8:1 in 74.4 sounds good to me. If the others are Mondial or Asso that would work. I'm in North Carolina.
Toby
Toby
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