metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Sept 1, 2013 17:11:46 GMT -5
Hey Anders,
How did you build the fueltank breather?
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gidge348
Senior Member
Joined: September 2010
Posts: 426 
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Post by gidge348 on Sept 1, 2013 19:46:29 GMT -5
Yes, I bought this one as well, the main reason was the postage, SparkFun wanted $65.00 to post it and this was only $7.00..... Call me stingy if you like......  |
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Post by Johansson on Sept 1, 2013 23:08:52 GMT -5
Hey Anders, How did you build the fueltank breather? Just a steel braided hose bent like an upside down U, nothing fancy. |
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Post by Johansson on Sept 1, 2013 23:12:32 GMT -5
Yes, I bought this one as well, the main reason was the postage, SparkFun wanted $65.00 to post it and this was only $7.00..... Call me stingy if you like...... 65 dollar? Ouch... |
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Sept 2, 2013 3:09:50 GMT -5
Hey Anders, How did you build the fuel tank breather? Just a steel braided hose bent like an upside down U, nothing fancy. Hi Anders not sure what the SCTA rules are like with breathers but in Australia the DLRA rules on fuel tank breathers states " All fuel tanks shall be vented. Fuel tank vents shall be provisioned to eliminate spillage in the event of a rollover".This usually means some type of one way valve to allow air in but not fuel out or something I have seen done is to wrap the fuel line around the tank so no matter which way it lands the fuel will not run out. Might be worth checking on the Landracing site. Ian... |
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Post by Johansson on Sept 2, 2013 4:22:03 GMT -5
Good input, I´ll take a look at that. A one way valve sounds easiest.
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metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Sept 2, 2013 6:24:15 GMT -5
Good input, I´ll take a look at that. A one way valve sounds easiest. should do the trick |
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Sept 2, 2013 8:23:01 GMT -5
Good input, I´ll take a look at that. A one way valve sounds easiest. should do the trick That should be fine, and 4 pounds is nothing, might be worth checking with SCTA to make sure.(I am sure you will get everything ticked off before you go.) Unfortunately I have seen people in Australia that are not as organised as you drag their vehicle thousands of Km's only to be sent home because of something silly like they did not have steel valve stems on their tyres  |
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metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Sept 2, 2013 9:08:07 GMT -5
That one-way walve won't stop flashbacks into the tank, am I right?
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Sept 2, 2013 9:21:42 GMT -5
I don't think they are worried about that, it is just if there is a crash & the bike is on its side and the driver is out to it, they don't want a pool of fuel forming on hot exhausts/batteries etc.
They probably will want to make sure the breather is clear of the exhaust, I am sure Anders will get all the pics to the scrutineers before leaving and will fix in any small problems.
I can't really see any major things that stick out as yet, the workmanship and concepts are all very good and I said it is usually the very small things that the scrutineers pick up on.
Ian...
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metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Sept 2, 2013 9:49:14 GMT -5
I don't think they are worried about that, it is just if there is a crash & the bike is on its side and the driver is out to it, they don't want a pool of fuel forming on hot exhausts/batteries etc. They probably will want to make sure the breather is clear of the exhaust, I am sure Anders will get all the pics to the scrutineers before leaving and will fix in any small problems. I can't really see any major things that stick out as yet, the workmanship and concepts are all very good and I said it is usually the very small things that the scrutineers pick up on. Ian... You're probably right but I was hoping I could get a "no, then you need a..." kind of response I need a flashback arrestor of some sort for a project I'm working on |
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Sept 2, 2013 21:50:02 GMT -5
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metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Sept 4, 2013 18:08:42 GMT -5
Thanks!
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Post by Johansson on Sept 5, 2013 14:17:26 GMT -5
I will have to modify the internal oil lines a bit before I can run the bike, last night I tested the preheat and spooled the engine up to starting revs with full oil pressure and when I opened the engine cover drain almost 10cl of oil poured out. Yet another leakage in the damn banjo couplings for the journal bearings...  Believe it or not but I am glad that it happened, because now I have a reason to tear the engine down and redesign the whole internal oil line arrangement. I could never torque the banjo bolts properly due to the assumed weak threads in the cast aluminum housing. I wish I had done it like John with his 10/98 where he drilled oil lines in the housing, I´ll try to make something similar now. Here is an old pic to show what it looks like now.  Another good thing is that I got a chance to find out if I could remove the gas producer from the frame without having to take away the gearbox or air intake first, it was tight but doable so now I know that field repairs can be done relatively easy.  While I removed the gas producer I filled the starting tank with the scuba compressor I inherited prematurely from my father, it wouldn´t hurt to overhaul the valves but I still got the tank up to 180bar which is close enough to the 200bar it is classified for.  After a short while the JU-01 was resting on the work bench, this will hopefully be the last time I have an oil leak inside it.  I called it a night after I had removed the engine cover, I am looking forward to figure out how to do this.  Cheers! /Anders |
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Post by racket on Sept 5, 2013 15:40:51 GMT -5
Hi Anders
Is it entirely the banjo fittings or oil bypassing the turbine seal and leaking down into the casing, as I've experienced oil in the casing ??
The 10/98 has a bit more drainage space , whereas you are using a scavenge pump, was it operating correctly , or could it be a slow drain back from a head of oil whilst standing for extended periods ??
Cheers
John
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