High speed problems

**motorbyclist** · 27th August 2008, 00:08

Originally Posted by renegade master

MC22's DO NOT HAVE A FUEL PUMP.

what model was rob's one then?

**The Pastor** · 27th August 2008, 00:24

Originally Posted by motorbyclist

what model was rob's one then?

mc19

**motorbyclist** · 27th August 2008, 00:45

:slap:

really?

**pritch** · 27th August 2008, 08:17

I know it's not a BMW but the Beemer workshop manual says the first thing to do always is replace the filters. If that poses a problem financially they should at least be cleaned.

If there is enough crap in the system to clog the filters I wouldn't run the bike without them.

As always though, ymmv...

**CB ARGH** · 27th August 2008, 09:27

Argh!

Just got back from an eventful trip down the motorway...

I replaced the fuel lines, I had installed it wrong on the filter to engine tubing, it had a right angled kink in it (yay I thought, problem solved). Replaced the fuel line anyway, took it for a ride. Same problem.

The air cleaner can't be clogged or blocked as we cleaned it with the "No Toil" branded cleaner and oiled it with No Toil branded oil too. I'll have a look at it again though just to be sure, however I really think it's fuel related since it runs for about a minuite at 100km.

Looks like it's a trip to the mechanic I think

**MSTRS:Me** · 27th August 2008, 10:21

Originally Posted by CB ARGH

... I really think it's fuel related since it runs for about a minuite at 100km...

You have fuel in the tank and an engine that isn't getting it quick enough. That suggests some sort of interruption in the flow to the carbs. This can really only be some sort of physical impediment. Like a blockage, or a vacuum lock.
Let us know what the mechanic finds.

**Spyke** · 27th August 2008, 17:18

Could it be float levels?

**Henk** · 27th August 2008, 18:30

Unlikely, float levels usually only affect running at seriously low revs where the fuel level in the carbs helps set the mixture. If it runs in the midrange the floats should be opening enough to supply fuel at full noise. I would check filters at the carb if it has them and it may pay to take the bowls of and clean out the mainjets.

**motorbyclist** · 27th August 2008, 19:33

Originally Posted by CB ARGH

The air cleaner can't be clogged or blocked as we cleaned it with the "No Toil" branded cleaner and oiled it with No Toil branded oil too. I'll have a look at it again though just to be sure, however I really think it's fuel related since it runs for about a minuite at 100km.

isn't that a paper filter? if you've put lube on a paper filter it's no wonder she's suffering. if it's foam it's entirely possible you've applied too much lube and are blocking it that way

but for you described problem, i think fuel supply is the issue, not air - carby cleaning time!

**CB ARGH** · 27th August 2008, 22:17

Originally Posted by motorbyclist

isn't that a paper filter? if you've put lube on a paper filter it's no wonder she's suffering. if it's foam it's entirely possible you've applied too much lube and are blocking it that way

but for you described problem, i think fuel supply is the issue, not air - carby cleaning time!

Yeah the paper filter was removed by the previous owner and a sponge filter has taken it's place. Seeing the price of a new air filter (bout 72 bucks

) I decided just to re-oil it. There is definately not to much oil on the filter, I'd say there wasn't enough haha.

I'm going to inspect the fuel tap tomorrow morning, which means taking all the tank out and off... dam. If it gets the ol' girl running fine then I'll do whatever. I hope it's not carby related. If it is, then it's straight to the mechanic... well, it is anyway.

**CB ARGH** · 27th August 2008, 22:23

Actually if anybody is willing to help me out a bit to show me what I could do... that would be wicked?

**motorbyclist** · 27th August 2008, 22:36

might want to give squiggles a PM with regards to "fix it day this friday"

**CB ARGH** · 28th August 2008, 22:05

Problem resolved.

Turns out I put the vaccum valve pipe on the wrong thing at the fuel tap. DOH!

**MVnut** · 28th August 2008, 22:35

Confucius say 'to have high speed problem, first one must have high speed'

.......glad it's fixed

**MSTRS:Me** · 29th August 2008, 09:33

Originally Posted by MSTRS

You have fuel in the tank and an engine that isn't getting it quick enough. That suggests some sort of interruption in the flow to the carbs. This can really only be some sort of physical impediment. Like a blockage, or a vacuum lock.
Let us know what the mechanic finds.

Originally Posted by CB ARGH

Problem resolved.

Turns out I put the vaccum valve pipe on the wrong thing at the fuel tap. DOH!

It's usually the simple thing that is the reason...