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Post by ralphtown on Oct 7, 2013 13:19:33 GMT
Firstly,forgive me if these questions have been answered before.
But...
1-I,m convinced the oil filter union bolt (the one the filter screws to) is knackered.
It could be my fault but I,ve just spent over an hour getting a HF303 filter(brand new) off of the bolt.
So,can I replace it by simply unscrewing it and wheres the best place(cheapest) place to buy.
2-If I remove the tank,whats stopping all my fuel from pouring out?
There is,nt an "off" position on the fuel tap.
3-I,m assuming the "thing" bolted to the engine block next to the cam chain tensioner is a fuel pump.
Do they fail?If yes,what are the symptoms and where do I get a new one from(cheapest place for spares).
Mine has a distinct smell of petrol around it and I,m sure a little fuel is escaping from somewhere and leaving small 50p
size stains on my drive."Something" is collecting on the engine underneath it.frankly,it just does,nt look or smell right.
Cheers.
RALPH.
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Post by gsteinert on Oct 7, 2013 13:42:22 GMT
I'm going to skip over question 1 as I don't have a clue. But...
The fuel tap works on a vacuum. The smaller of the two hoses connects to the intake manifold (I think.. intake something at least!) and the vacuum there when the engine is running holds open the tap. No vacuum, the tap is closed so when you take the fuel tank off the fuel will stay put unless you put the tap on prime.
As for the fuel pump, are you looking at a 600 or 900? On the 600's of that age the pump is a vacuum pump. Kinda flat with three hoses, one through a filter to the fuel tank, one to the intake to the carbs and the third to the engine. These pumps are AWFUL! If you run the engine dry, you'll flatten even the best battery turning the engine over before you get enough fuel in the carbs to start it. That said, I've not heard of them leaking. Your best bet is to check all the fuel pipes (there are three from memory) for splits and cracks. A fairly easy repair if that proves to be the problem.
Gary
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Post by ralphtown on Oct 7, 2013 14:07:19 GMT
Thanks Gary,
I,ll feel happier taking the tank off from now on.I kind of thought that there was a a one way valve arrangement in the tap.
The "thing" I,m on about seems to be bolted to the engine block on the gear shift side and has a rubber boot covering one side.It must be something to do with fuel or possibly carb pre heat.
Just recently,the bike has been reluctant to start or turns,then feels like it caught on something.Pulling in the clutch lever helps.
I,ll rip this bike to bits then.Check all the hoses and try and identify whats what.Replace the fuel filter and check those hoses.Would really like to know what that gizmo is on the engine.
RALPH.
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Post by ralphtown on Oct 7, 2013 14:14:58 GMT
I,ll have the spec of the fuel hose too,if anyone knows it.
Internal diameter or best place to buy a metres worth.
What have "you" used on your bike...anyone.
RALPH.
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Post by rowlf on Oct 7, 2013 14:36:19 GMT
I,ll have the spec of the fuel hose too,if anyone knows it. Internal diameter or best place to buy a metres worth. What have "you" used on your bike...anyone. RALPH. It is 6mm internal diameter fuel hose. Halfords sell it or it is readily available off ebay. £3 a metre including delivery. www.ebay.co.uk/itm/6mm-1-4-ID-FUEL-LINE-HOSE-PETROL-DIESEL-OIL-COTTON-OVER-BRAIDED-RUBBER-PIPE-/300878231257?pt=LH_DefaultDomain_3&var=600093992542&hash=item460dbd76d9The "gizmo" you are referring to is the oil switch solenoid. It is controlled by a thermostat and switches the flow of hot engine oil that heats the carbs. The pumps rarely fail but they are not very good. Never heard of one leaking but it could happen. If the carbs empty due to evaporation after storage or if you run out of fuel the pump really struggle to get fuel into the carbs again. Switching to "prime" helps as the fuel is then flowing all the time. As someone said, when the tap is set to "on" or "reserve" the fuel only flows when the engine is running (vacuum switched). It flows continuously on "prime". |
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Post by ralphtown on Oct 7, 2013 21:41:53 GMT
Cheers mate,
Its alongside the fuel pump,I think.
I,ve ordered 2 metres of hose,so will replace all the hoses.
Lets face it,the bike is a 1992 and who knows how old all that tubing is.
I,ll use small cable ties to secure the hoses.
Right underneath the fuel pump,is a flat area of the crank casing.
I have fluid collecting there.
Now,I see it as...if it was petrol then that would run off or evaporate.
I,m thinking theres a little oil leak there so might order a new fuel pump and filter.
Again,its all belt and braces.I,ve got fluid of some kind,leaving little puddles on my drive,so I,ll take it all to pieces and start replacing everything.
The oil filter issue is solved by "The Union Bolt".Sounds like a 70s rock band but it is replacable.
Then I,ll fit a new oil filter,again,maybe the filter that was on there was crossed,so maybe thats why I have a leak.
I,ll keep you all posted .
RALPH.
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Post by neilmud Lord Protector on Oct 7, 2013 21:52:16 GMT
Assuming it's a 600 check oil breather into the air box for crud as this can build up & appear to be an oil leak there are plenty of threads explaining this & the best way to remedy it.
neil
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Post by gsteinert on Oct 8, 2013 5:45:48 GMT
Assuming it's a 600 check oil breather into the air box for crud as this can build up & appear to be an oil leak there are plenty of threads explaining this & the best way to remedy it. neil That's an oil-cooler problem isn't it? The 1992 Divvy is a few years early for that. I may be wrong... the breather hose is still there on the air cooled versions after all! Gary |
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Post by ralphtown on Oct 8, 2013 8:51:24 GMT
I,ll check to see if I have any hoses going to the airbox.It is a 600.
RALPH.
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Post by rowlf on Oct 8, 2013 10:35:17 GMT
I,ll check to see if I have any hoses going to the airbox.It is a 600. RALPH. The so called "oil leak" does not apply to a 1992 XJ600 divvy ! It happens on the 1996 and later versions that have an oil cooler and an extra, small breather pipe between the valve cover and the airbox. Oil is forced through this extra breather pipe into the airbox by engine crankcase pressure, under certain conditions, getting worse as the engine wears with age. The oil then drains out via the airbox drain hose, making an oil puddle on the ground and giving the appearance of an oil leak. Yamaha did make a modification kit to solve the problem on the 1996 on divvies. Much later models had a different breather pipe arrangement so the "leak" never happens. I have a 1995 model, which is virtually identical to your 1992 model. No oil cooler, no extra breather pipe and no "airbox oil leaks" ever! |
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Post by ralphtown on Oct 20, 2013 14:55:36 GMT
OK,
A quick update and another question.
The bike has been off road for 3 weeks now.
I,ve had to replace the oil filter union bolt (the one the filter screws to...£31!!!) due to someones hamfisted oil filter replacement.
I,m blaming myself but I,ve done hundreds of canister type filter replacements on lots of different vehicles and never managed to cross thread one of them.
The engine has been fully serviced,inc plugs,air filter,oil and filter.
After xmas I,ll do the valve clearances and balance the carbs with my (christmas pressie)vacuum gauges.
However....I still have a small oil leak (it is oil coz there was no oil in the bike for 3 weeks and hence no puddle on the drive).
I believe its coming from one of the hoses on the back of the block but I,ve given it a jolly good clean in there so I should notice any wetness.
The smell of petrol has vanished due to me discovering the vacuum hose on the back of the pet cock was not connected.
I,ve also discovered that the pet cock needs replacing,as it flows petrol when the engine is off.
So,still a few little issues.
So,the simple question.....Where does the very fine hose connect that comes off of the pet cock vacuum hose?
I have a very fine,around 1mm pipe that does,nt seem to connect to anything.
Any ideas?
RALPH.
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Post by rowlf on Oct 20, 2013 16:06:15 GMT
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Post by ralphtown on Oct 20, 2013 16:13:23 GMT
I,ll bet theres a bigger bore pipe between the carbs,that you can,t see without removing the tank.
I can,t remove the tank without petrol pouring out.
So,I,ll cut a length of fuel hose and screw a wood screw in one end.
this will solve that problem.
Then I,ll have a good poke around for a larger bore pipe that looks lonely.
Its revving nicely,so it can,t be very important.Theres a T piece off of the pet cock vacuum hose with this very fine tube attached to it.
I,ll find it but it just helps to know you,re getting it right.
RALPH.
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Post by rowlf on Oct 20, 2013 16:31:15 GMT
I,ll bet theres a bigger bore pipe between the carbs,that you can,t see without removing the tank. Don't know if this helps. It is from a later divvy but shows the pipes.  Pipe 28 goes to the manifold for the vacuum. |
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Post by ralphtown on Oct 20, 2013 20:35:38 GMT
Yes,item 28 is the bigger bore vacuum pipe but mine has a "T" piece near to the pet cock,which as a very small bore plastic hose. I believe there is a bigger bore pipe that the thin plastic one just slides into. I,ll have a go at it,once I,ve made my Heath robinson fuel pipe that will prevent my tank from emptying all over the bike  RALPH. |
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Post by neilmud Lord Protector on Oct 20, 2013 23:29:59 GMT
Thats not a tapping for snotoiler or some other vacuum operated addition.
Neil
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Post by ralphtown on Oct 21, 2013 11:02:16 GMT
Neil!
you might have something there.
I,m sure the bike had one of those before I bought it.
There was a Scott Oiler sticker on the side of the fairing,when I got it.
Does,nt seem to matter what I do to it,nothing happens on the bike.
I guess the question now is....Anyone on here got a Scott Oiler fitted to their bike?
But I think you might have the answer there,Neil.
Thanks.
RALPH.
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Post by ralphtown on Oct 21, 2013 11:20:18 GMT
Well,it was a very good guess.
Unless Scotts changed the arrangements,the oiler for a 600 connects to one of the carb balancing screws using a piece supplied with the kit.
But the size of the pipe on the bike,looks like the same as the pipe that feeds oil onto the chain.
I,ll have a good poke around,once the rain stops.
RALPH.
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Post by ralphtown on Oct 22, 2013 13:21:09 GMT
Put a very small woodscrew into the tiny hose today and went off to see my daughter,seeing as its her birthday. Bike ran fine and I think I,ve even cured the oil leak with the new union bolt and Yamaha oil filter. So,just need valve clearances and carbs balancing,then a pair of new tyres. Then head off to Portugal RALPH. |
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