Top posting users this month
adespin
 
JohnW
 
barker
 

Top posting users this week
adespin
 
JohnW
 
barker
 

Who is online?
In total there is 1 user online :: 0 Registered, 0 Hidden and 1 Guest

None

[ View the whole list ]


Most users ever online was 29 on Tue 30 May - 4:54
Latest topics
» Anybody Out There
Thu 21 Sep - 7:28 by barker

» 1994 T80 Grey Townmate
Wed 20 Sep - 5:33 by JohnW

» North Coast 500
Sun 27 Aug - 22:01 by Dave Weller

» Problem with headlight'dipswitch
Tue 22 Aug - 0:41 by Mark1982.

» soutern softies
Mon 21 Aug - 8:58 by Mark1982.

» Another Japanese home market (grey import) T80
Thu 17 Aug - 7:21 by JohnW

» Front brake upgrade
Thu 17 Aug - 5:24 by adespin

» gear change
Sat 12 Aug - 21:54 by JohnW

» yamaha v75 1974
Sun 6 Aug - 22:01 by JohnW


T80 Cylinder Capacity Limit

View previous topic View next topic Go down

T80 Cylinder Capacity Limit

Post  3hundredspartans on Sat 3 Aug - 23:23

Hi All,

Can anyone clarify what is the CCs limit for a T80 cylinder?

Being 79cc as standard, to what capacity would it be able to be bored out to?

I'm hoping it can go to 100cc to give it more punch.

Cheers, Frank.

3hundredspartans

Posts : 218
Join date : 2012-04-17
Age : 49
Location : Sydney, Australia

View user profile

Back to top Go down

Re: T80 Cylinder Capacity Limit

Post  JohnW on Sun 4 Aug - 4:01

I would not think its possible to bore out to 100cc, you would break through the casting wall, also you will be limited to the largest oversize piston available which I think is 1.5mm which would only give an increased capacity of 84cc.

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: T80 Cylinder Capacity Limit

Post  Admin drgaz on Sun 4 Aug - 7:44

is the bore a pressed in liner? you could have a 100cc liner fitted may be.

avatar
Admin drgaz
Admin

Posts : 526
Join date : 2011-03-23
Age : 58
Location : Leicestershire

View user profile http://www.minigallery.co.uk/Anne_Twist/      http://bazzarpixie

Back to top Go down

Re: T80 Cylinder Capacity Limit

Post  JohnW on Sun 4 Aug - 19:15

There is no liner in casting & to take it out to 100cc you would need a bore of 53mm (standard is 47mm) thats the outer diameter of the current spigot, so if you allowed for a spigot of 3mm wall thickness, the cylinder casting would need to be bored to 59mm it would then break through the casting particularly the underside where it is very thin anyway, in fact it would break through at 53mm. You would also need a piston of 53mm. The jobs a No No & the increase in performance would be minimal.

JohnW

Posts : 1018
Join date : 2011-10-29

View user profile

Back to top Go down

Re: T80 Cylinder Capacity Limit

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum