classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: hammo on December 13, 2013, 11:48:29 AM

Title: Bike CC
Post by: hammo on December 13, 2013, 11:48:29 AM

Hi guys , my Triton is a 1971 650cc by the engine numbers , on the V5 its a 750cc , i think its a morgo kit , is there anyway i can tell if its 750cc without taking the engine to bits ? 

Title: Re: Bike CC
Post by: beng on December 13, 2013, 03:48:22 PM

    I am pretty sure that Morgo 750cc kits had a different fin shape than the standard Triumph cylinder, they were shaped to match the head fins better.
 
    Some other Triumph big-bore kits had various other fin shapes including closely replicating the standard fins, but they would have been cast at various foundries and have different casting numbers and marks than the originals. 800cc kits were also sold back in the day, so doing a CC check or actually measuring the bore is going to be your best bet.
 
     In the end if the bike goes well it does not really matter, until you have to tear it down for a re-ring or overbore.
 
      Throw up a photo of your bike for us to see if you can, just for kicks.

 

Title: Re: Bike CC
Post by: esometisse on December 13, 2013, 07:00:24 PM

easiest way to tell the different barrels apart is the number and shape of the fins.
Standard 650cc Triumph is 8 fins and round
Standard 750cc Triumph is 7 fins and round
Morgo 750cc is 7 fins and angular

Cheers
Andy

Title: Re: Bike CC
Post by: hammo on December 15, 2013, 05:56:32 AM

http://s1292.photobucket.com/upload This a photo of my triton any ideas of the engine cc?

Title: Re: Bike CC
Post by: R on December 15, 2013, 08:06:04 AM

That link isn't complete enough to go to your pic...

Title: Re: Bike CC
Post by: L.A.B. on December 15, 2013, 09:32:00 AM

http://www.morgo.co.uk/morgo-750cc-big-bore-kit/26-750cc-big-bore-complete-kit.html