My VFR is gassing me!

I have a 1986 VFR750. It's a UK model.
When the bike gets warm there is a strong smell of petrol. Waiting at traffic lights is not pleasant!
I cannot find any leaks and when the bike is laid up in my garage I cannot smell any petrol.
The bike runs perfectly.
Anyone got any ideas what is going on?
Many thanks
Steve

 

GUESS: Fuel crossover tube o-rings. Under pressure from the pump they are weeping and the warm air off the engine is bringing the smell up. When parked, it is not continuing to weep or drip.

If they haven't been done, they are now over 35 years old, been exposed to fuel and hot-cold/hot-cold cycles.

Exactly what my friend's 86 did... until it starting POURING out.

 

^^ yes, fuel crossover tubes need new O-rings. use viton -.012 rings available from any industrial bearing supplier. takes time and you will probably need an impact driver to remove large screws holding carb units to base plate. good time to replace float bowl gaskets too. the O-rings can shrink, deform, or be bridged by rust deposits to cause leaking.

 

I really appreciate your replies. Many thanks for that!
When I restored my VFR I did the float bowl gaskets when the carbs were off. But not the fuel crossover tube O-rings... How I wish I had done them now!!!
Getting the carbs off is a pain in the butt. Hoped I would never have to do them again. Oh well, you live and learn (or not always in my case...).
Thanks again dudes!
Steve

 

^^ no steve the carbs will come off easily unless they've been on since forever. loosen clamps on both sides of the boots.





what's bloody hard is getting them bitches back on !

 

Before resorting to an impact driver use the proper tool. All "Philips" head screws are JIS head. Using Philips or Pozidrive tools will be much less effective and more likely to damage screw head .

Get a set of JIS No1 and JIS No2 drivers and you will see the difference.

That said a really siezed screw will need resort to a JIS impact driver bits.

 

i wish the guy who sent me carbs from a vtr250 to clean knew that......


this is exactly what he sent me

 

Thanks.

I invested in some JIS screwdrivers and bits a few years ago - what a game changer!