I have just taken my x ply standard tyres, tires off one of my mark 1 canes and replaced them with 1 size up pilot road 3's (radials). They fit like a glove with no alterations to anything and although I have only done 20miles on them everything feels so much better. I will keep you all posted on the final result.
Changed from 110/80 to 120/70 on the front and from 140/80 to 150/70 on the rear. The ride is like floating on air compared with the old ones and these are supposed to be good in the wet as well.

 

welcome in to the hurricane section mitremac
thanks for the info on the larger tyres mine will be up for replacement in the summer and have been looking at the bigger tyres, keep us updated and get some pics up of the canes, use photobucket or the like

 

I did the same thing to my 1987. You can sueeze a 160 on the back but the profile is all wrong. I'm running the 150 now and am very happy.

 

Just waiting for my new camera which should be here by Friday I will try and get some pictures posted then.

 

+1,120 front and stuck with a 150 rear on my 87 thanks to PMCG's recommendation
about larger tires 160 + forcing the profile too much & I went with a super cheap deal
Conti Motions ($159.. 2 tires shipped)

had them well past the ton and in the twisties and in drenching rain - they did well and
wear all that too.

 

Here's the 160 mounted. you can see it would have almost no tire/road contact when you leaned it over.

 

i can see what you mean, it dont look good , i will go to the 150 when i change them

 

my tyres are due now, just a quick question mitremac, the 120 on the front, are you using the original mudgaurd, just want to check it dosent fowl it, before i order the tyres

 

if you wish for something bigger, ec gen and hird gen wheels it easyly on the mark 1.
I run 120 in front and 180 on the rear,

 

Yes I am using the original jelly mould mudguard with no problems, I haven't had time to run them in properly yet but everything seems better.