The fork has no springs in it, so it's not quite as bad as it might look at first glance.Be interesting setting the float heights for that carb angle.
It was posted 2-22-24 it Facebook "classic motorcycle racing" search under "newest activity" The link doesn't work when I paste it here.Can you post a link to that forum? Thanks.
Ken
With an OIF Triumph, the filler cap is at the top of the vertical leg of the frame, just in front of the seat.How much oil would it hold in the frame, with a high revving race bike the more oil the tank holds better for cooling, I know the oil in frame Triumph didn't hold too much oil in the frame 2/3 ltr at the most and the oil was always hot till I installed a Lochead oil cooler, but then I run oil coolers on all my old British bikes for our hot climate and oil in a thick wall frame cube the oil will take longer to cool down, also need that air space above the oil and the filler cap, so is an oil in the frame such a good idea for a race bike, a light weight alloy oil tank be so much better for cooling in my opinion.
Ashley
Agreed, you can’t fill that OIF to the brim !But with any oil tank you still need that air space weather in a tank or frame.
Even that’s not an issue if the spine has a big sump plate like an OIF Triumph.There are advantages to oif
The main one IMO is the whole frame acts as an oil cooler
It takes up less space
You don't have the additional weight of an oil tank
The only disadvantage I can think of is they are difficult to clean out
Yep I agreeEven that’s not an issue if the spine has a big sump plate like an OIF Triumph.
Take off the sump plate and filler cap and it couldn’t be an easier thing to clean out IMO.
Did you mention in the past that you remove the oil cooler when fitting a triple into an oif ?The tube on that Norton frame looks to be about 3" dia. which is the same as a Triumph/BSA P39 type. As standard they hold 4 pints, but when modified to top fill hold 7 pints with room to spare. I have just finished converting another one to do that, & also to take a T160 motor. Over the past twenty years I've changed five of them, twins & triples, & they run much cooler with zero problems. I also leave the original filler in place to aid cleaning when necessary.
A Commando frame using an OIF design is an intriguing project.I have just finished converting another one to do that, & also to take a T160 motor. Over the past twenty years I've changed five of them, twins & triples, & they run much cooler with zero problems. I also leave the original filler in place to aid cleaning when necessary.
Yes the oil cooler & thermostat was removed from my 930 O.I.F. T160, after talking to Richard & Dave when I was at P&M. They mentioned a customer of theirs in Spain, who found it simply wasn't necessary.Did you mention in the past that you remove the oil cooler when fitting a triple into an oif ?
I do have some pictures of the mods but can't retrieve them just yet. They are in my old lap top which has crashed, something called the Blue wall of death I believe. I'll be taking it to a mate of mine in a few weeks to see if he can rescue my files, as I haven't got a clue how to.A Commando frame using an OIF design is an intriguing project.
Martyn: Do you have pictures of your P38 mods? Did you change the failure prone boss for the swinging arm as well?
- Knut