how do i use Silkolene Pro FST?

[mossi123uk]

i was told Silkolene Pro FST would help my bike out, i have a yamaha xj 600s diversion i think it has a 17 litre tank.
do i just tip some in with the petrol? and how much should i put in with a full tank and how often should i use it?

[numpty2]

You just put it in the petrol tank, recommended concentrations are written on the Silkolene Pro FST bottle.

You don't say why you are wanting to use it. Pro FST is specifically for carb icing, where under certain cold weather conditions ice can form in some of the carb jets. The bike starts running badly and eventually dies. It tends to be restricted to certain older bikes. Newer bikes often have carb heaters built in. I need to use it on my current Honda CB250 (1993) and I also needed it on a Suzuki GN250. It makes all the difference to my bikes, but I am out at 7am when it is quite nippy. Some people claim that switching to the high octane petrol is enough for their bikes. It does seem to be more of an issue in the UK, maybe a combination of our fuel & our cold & damp weather. Damp cold air is the issue, dry cold air doesn't cause problems. There are lots of recommendations out there, such as:
https://www.ukmonster.co.uk/monster/showthread.php?t=20492

[The Tot]

What problems are you having with your bike?

Do you find that when riding in fog with air temperature between <4 deg that your bike's engine starts hunting or surging after being held at a constant throttle for a period of time, i.e. motorway riding?

The problem was endemic in carbed Kawasakis which caused it to bog down at 70-90mph when you're going for an overtake. Basically the carbs act as a cold well, and at very cool temperatures when it's damp, the water contained in the air/fuel charge freezes and momentarily blocks the jets in your carbs, giving you that surging, especially after being at a steady state for a period of time.

If that's the symptoms you're getting, then it works well. I doubled the dose on my Ninjas purely because it suffered from it pretty badly on long motorway jaunts.
____________________
The Tot 2019 Z1000SX - 2007 R1
Never argue with autism

[Walloper]

Fuel Additives are more or less Snake Oil.
They are proven to do very little is nothing to enhance performance.
Better to make sure the fuel is good quality, filters are clean and ignition system is A1.
____________________
W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[neatbik]

FST doesn't claim to enhance performance as such, it just combats carb icing.

From memory i think you use 1-2% of FST to your petrol quantity.

[Walloper]

[numpty2]

I would normally agree with the snake oil comment. It's certainly true of pretty much nearly all fuel & oil additives. But I have been riding bikes for over 25 years now, and the FST does actually work. I never used to have problems in cold weather, but 11 years ago I changed my job and now have an early morning commute so I'm riding in really cold damp weather. It really becomes a problem in January & February. Anyway the FST has fixed the problem on 2 different bikes now. When I changed from the Suzuki 250 to my current Honda 250 I tried to get away without using it, but come the first winter the same problem returned. So my advice is wait and see if you need it. Maybe try the 97 octane fuel first. If it's still a problem try using the FST at 1%. If that's not enough go up to 2%. Don't put it in just in case, wait until you know you need it.

[DJP]