Tyre choice advice

S

Starman

New member
Location
S wales
Hi all,
i Would appreciate any advice regarding best choice of tyres and sizes for my newly acquired 1972 750SF.
thanks for any advice/input all.
marty.
 
Sizes would be 100/90 front and 110/90 rear.
I've used Metzeler Roadtec 01 or Lazertec with great satisfaction.
Am testing Bridgestone BT46 with a 120 rear on my SF2 at the moment. Have done about 3000 km in the last month and am very pleased.

Paul
 
Paul Marx said:
Sizes would be 100/90 front and 110/90 rear.
I've used Metzeler Roadtec 01 or Lazertec with great satisfaction.
Am testing Bridgestone BT46 with a 120 rear on my SF2 at the moment. Have done about 3000 km in the last month and am very pleased.

Paul
Click to expand...
Thanks Paul,
i had read the older BT45’s were well rated, the replacement BT46’s equally so, has the larger 120 rear made any noticeable changes to riding ‘feel’?
 
Conti Go on the 71' 750SF, great tire and better handling than the previous Metzeler Lasertec.
Metzelers lasted 5000 Km and handling towards the end was really bad.

Gerald
 
I have been running Bridgestone Spitfire s11 100/90 - 120/90 on my 3C ,work very well, of course I'm not grinding pegs or anything like that, I save that riding for my modern sportbike.
 
Starman said:
Thanks Paul,
i had read the older BT45’s were well rated, the replacement BT46’s equally so, has the larger 120 rear made any noticeable changes to riding ‘feel’?
Click to expand...
No difference in feel with a 120 for normal road riding. I just like the slightly beefier look.

Paul
 
I ordered a set of bt46's for the sf2, 120 rear, 100 front, but didn't end up using them. They went on the green jota I just finished repairing instead. Has anyone tried the Michelin classic yet? Replacement for the pilot Activ, apparently now in stock in Oz.
 
Paul Marx said:
Points means the bike gets ridden. So wears tyres.

Paul
Click to expand...
Thank you everyone for the info and advice, much appreciated. My SF is running points and I will probably stick with them, as I am familiar with their set-up, having been riding and maintaining my bikes since I got my licence in 1974.
i don’t trust electronic ign 100%, i had a Boyer system die on me, luckily I kept the old points set-up in my tool kit, and that got me home and remained on the bike. That was back in about 1986, maybe aftermarket electronic ignitions have improved and are more reliable now?
i have read about a ‘Pazon’ brand kit meant for British twins that can be fitted with some work?
my SF was running rough when I got it last month, but the timing was 10 deg too advanced on one cyl, 19 deg the other!
it’s spot on now though, and with the carb slides synchronised it’s running like a Swiss watch.
compression tested down a bit on R/H cyl (175psi L, 115 psi R), i suspect worn rings as a result of open bell mouths and no air filtration since new?
id like to fit some K&N type air filters but there’s not much room, unless I make some stubby bell mouths with the matching thread for the carbs?
Thanks everyone,
marty.
 
Airbox and rubber intake connectors allowed me to fit big pod filters inside the airbox - involved cutting away the metal where the std filter used to fit. Filters connect to tubes that push into the rubber intakes. Allows easy removal and much more space in there.
 
Hi, and thanks again all,
new tyres this weekends project, air filters (air box probably) will be a winter project,right now I’m just going to enjoy riding my SF for what’s left of a Welsh summer.
Summertime in Wales is grand, the rain gets just that little bit warmer…..

Marty from old South Wales
 
Make sure your tyre is rated for the max speed of your bike.

This tyre was on Jack Frost's turbo Hayabusa when it came apart at over 200mph on Pendine Sands (UK) a couple of weeks ago. Amazingly he stayed on the bike and came to a stop running on rim of carbon wheel. He was apparently uninjured, but looking at the damage to the back end of the bike, I reckon he got a nasty slap in the arse from the busted tyre.
 

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