Bully fanatic wrote:
Would the dodgy bit be the extra small fuel tank in the corner of the stainless petrol tank holding tank? Top left. Very sneaky Greg. Having a mini
Piuma and not telling us.
So that was TOO many clues for an
Fanatic! Now I have to think of another.........
While we are on your favorite Marque Graham, do you remember what size pilot jet is in the RED
? My 350 Piuma has a 55 and the 250 Piuma carby I have here is 55 as well and I think it might need to go Bigger? Let me explain as it has been a couple of months since I have ridden it and it has always had a hot start problem. Cold starts beautifully and when I get as far away as possible from my starting point, it stalls at random and won't restart usually at the bottom of a hill. David and I discussed this month's ago and his suggestion of richening the idle mixture did help but the side effect was longer rides between breakdowns.
Maybe I was approaching the problem the wrong way but inside the magneto cover was a ever so slightly oily but I could not feel any free play in the mains. So I sourced some crank seals and fitted the magneto side one with the intention of riding it again and check smoke color when hot. The seal that came out had a blue tint and was quite thin compared to the new one. Put it all back together and it fired up nicely, warmed it up and then stopped it and restarted fine so good, ride Time! All was going swimmingly and I was really enjoying riding it until the greatest distance from the start point at the bottom of a gully and you guessed it. This was the point where I thought a spare plug and spanner would be a good idea! Anyway after pushing it up the hill and some choice words this website won't accept, it roll started but only at speed with the throttle open. What would a ride be without repeating this process a couple of Times? So I am 50/50 on riding the
at the moment, really enjoy the riding but not keen on the Pushing! Back to the idle mixture, Delorto's have the idle mixture screw at the cylinder side of the slide and yes I played with it and it seems best with the screw a fair way out but I think I am outside the usable range? Do the jets go in increments of 1, 5 or 10?
David Lahey wrote:
I was just reading the latest "Aeromodeller" magazine and came across something that might help Greg with his Italjet fuel tank woes.
It seems that suitable lightweight fuel tanks can be made from wood, and are compatible with the strange fuel brews that people use in model aircraft engines so should be no problem with unleaded 98.
All we need now is a craftsperson who can make nice-looking motorbike fuel tanks from wood
David, I am not prepared to give up on the plastic tank just yet but you do have me thinking. Remember this first photo:
Here is the same tank after 5 weeks submerged in 98 premium:
Taken after allowing to air dry away from the enemy AKA the sun, so it is 100 grams or 10% heavier now.
Back to the thinking part David, obviously you were suggesting HARDWOOD
My thoughts are what is made of wood, hollow and has a hole on the top for Filling?
Jools wrote:Interesting David, -what sort of wood would have been used, and how was it sealed?
(FF? CL? or what's your 'thing'?)
But to be realistic, surely if you were putting the work into making a wooden tank, you'd just put the work into a wooden Plug that can then be used to make a mould and then make lots of tanks?
And I can't see any species of wood being strong enough for a trials bike tank anyway can you?
Jools, I have no idea what FF? or CL? is but the wood that I have in mind is Poplar or Willow as they are readily available in hollow form. The problem is even though they come in many sizes, I don't think they are big enough unless I use a pair and even then they will need to be mounted Backwards!
Looks like a 3 man Job?