T140v Project With Tiger Cylinder Head

Hello and welcome, Jim.

I can't recall off-hand the exact details but I THINK you'll find that the Tiger TR7 is, in essence, a single carb. Bonneville, so the head has probably been put on the T140 to provide a relatively simple solution to the eternal problems of twin carbs. - balancing, tuning and fuel consumption. Essentially, unless you're striving for total originality, the bike will operate well (perhaps better!) on the TR7 head as long as the sinlge carb. is jetted to suit - especially if the specs. of both bikes reveal differences such as valve sizes/angles, etc.

Why not build the bike up and run it as is and, if you do seek the originality, just keep a vigilant eye on the usual places for a used T140 head whilst you enjoy the pleasure of riding the machine?

My 2 penn'orth. Good luck with it - we'll look forward to the build operation reports!

 

Many of the unit heads are interchangeable if you know the way around them, if you have the correct year single carb head on your bike with the correct year rocker boxes then its an easy job to swap the head for a twin carb head.

 

Jim Hargreaves
Welcome to the family. Don't see why you would want to swap as it should be a single carb head and easier to work on as the bonnie will have the twin carb. As to swapping you really go by studs there are i believe eight stud heads and 10 studs. Then you will have to set up the carbs and cables. If you have a single airbox you will have to find the twin airbox and make sure it fits or you need to run K & N Filters. Hope this helps. Do your build in the restoration and projects section and let the inmates take the journey with you. Don't forget lots of pictures.
Joe

 

Agreed most of the heads and rocker boxes are interchangeable with a few exceptions where the fun starts is there are several different lengths of push-rod and tubes but you should be OK with a straight swap for other unit stuff.

 

A great idea, address all the little jobs first

 

Oh n pics please with any other questions.

 

Hi Jim and welcome, lets see some pictures mate

 

you will soon pick it up Jim,wether you want to or not

 

Can't get it wrong mate even if you put it on backwards it'll still run