Motorcycle mechanics 101

[Onkel Neal]

I guess this is why my big Suzuki has been running like crap since August, isn't there supposed to be a hole in these pilot jets? :huh:

http://www.moto-dude.com/images/joe_ro6.jpg

http://www.moto-dude.com/images/joe_ro7.jpg

http://www.moto-dude.com/images/joe_ro8.jpg

http://www.moto-dude.com/images/joe_ro5.jpg



I bet Kyle would know!

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[UnderseaLcpl]

I guess this is why my big Suzuki has been running like crap since August, isn't there supposed to be a hole in these pilot jets? :huh:



That's likely a big part of it.

What kind of problems have you been having specifically? I mean, apart form owning a heavy Suzuki instead of a nice, light, CBR 1000?:D

Having problems with idling?

[Reece]

Probably made in China!:roll: What a bummer Neal, surely you can be compensated in some way?:-? Oh btw, stop chewing your nails!:lol:

[Letum]

Might be worth checking your needles whilst you have them handy. I have traced
more than one problem engine down to worn needles. The wear can be hard to
spot too.

*edit* If you are really, really lucky a local mechanic might have a jet-testing box.

[SUBMAN1]

Neal is a man after my own heart. Displays his example on top of a box of Winchester ammo! :up::up::up:

-S

[Reece]

Neal is a man after my own heart. Displays his example on top of a box of Winchester ammo! :up::up::up:

-SThat might change if Obama gets in!! .... Whoops, slip of the tongue, sorry!:oops::yep:

Regarding your problem Neal, I never get that.:D .... Fuel injection!:lol:

[SUBMAN1]

Neal is a man after my own heart. Displays his example on top of a box of Winchester ammo! :up::up::up:

-SThat might change if Obama gets in!! .... Whoops, slip of the tongue, sorry!:oops::yep:That would cause a revolution in this country. So I don't agree.

As Obama said, we cling to guns and religion over here, and even he nor anyone else has the power to change that.

-S

[Reece]

That would cause a revolution in this country. So I don't agree.

As Obama said, we cling to guns and religion over here, and even he nor anyone else has the power to change that.

-SSorry guys, I'll bite my tongue!:dead:

[Task Force]

So exactly whats rong with it, dum dum here knows about alittle about cars, alittle about boat motors. Nothing about Motorcycle motors. :-?

[Kyle]

Neal, you got it peg on the pilot jets plug, look like you are getting
eveything clean, One more thing to check, open the throttles valves
(put something in to hold it open) and blow air though the pilot screw
and check that there is air coming out of the tranfer ports under
the throttle valves, some times the ports can get plug up to.
I wish I could help with the carbs, but you are on top of it I can tell. Kyle

[Task Force]

So im getting that the crap that is in the fule nowdays could have stoped his fule Jets from shooting fule right makeing his bike run bad, Same thing happend with my dads boat.:yep:

[Onkel Neal]

Neal is a man after my own heart. Displays his example on top of a box of Winchester ammo! :up::up::up:

-S

Haha, I noticed that too, after I posted the pic :lol:

Neal, you got it peg on the pilot jets plug, look like you are getting
eveything clean, One more thing to check, open the throttles valves
(put something in to hold it open) and blow air though the pilot screw
and check that there is air coming out of the tranfer ports under
the throttle valves, some times the ports can get plug up to.
I wish I could help with the carbs, but you are on top of it I can tell. Kyle


Thanks, Kyle,good point, I will do that. I'm going to make sure the transfer ports are as clean as possible before putting it back together. :up:



Probably made in China!:roll: What a bummer Neal, surely you can be compensated in some way?:-? Oh btw, stop chewing your nails!:lol:


Blasphemy! This machine is Made in Japan, by excellent engineers. And I don't bite may nails, Reese, I trim them with a machette, of course.





That's likely a big part of it.

What kind of problems have you been having specifically? I mean, apart form owning a heavy Suzuki instead of a nice, light, CBR 1000?:D

Having problems with idling?

What? No love for the Big S? :)


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____________

[Reece]

Blasphemy! This machine is Made in Japan:rotfl:
I was actually just referring to the jets, assumed a mechanic had "repaired" your bike and used the parts shown!!:yep: My bike is probably 20% after market parts!:lol:

[Koondawg]

One thing I likes about those carb set ups are that they are easy to work on...get you a pipe cleaner and some carb cleaner...make sure the floats are adjusted when putting em back together...if you do alot of hwy riding try a one or two step larger jet! Need help call me...LOL :up:

KD

[AVGWarhawk]

Just for fun, dump the current jets you have and get larger jets. Do as Letum said. Check the needles. Sometimes just dirt and sometimes a previous owner, the maker or shop will crank the needled down until they bottom. Sometimes this will cause a ridge to form around the need shaft. More often than not these are brass and brass is a soft metal. Also, let your carbs sit over night in carb cleaner. Spare no expense on a new carb kit with new gaskets. Of all the mechanical parts on your bike, the carb is the most finicky so pay particular attention to the spec when you rebuild the carbs. Mikhayl is correct also, get a carb synch. Once you have the carbs rebuilt and clean. Adjust the jets until they bottom(do not force them hard in the seats). Then turn each back 2-3 turns. See how she runs.

[NealT]

Better yet...you are running a risk of not having a safe bike when you are done, I mean the jet fuel you use may leak out get over the engine, and cause a massive fire, burning you beyond all recognition. Now, since NONE OF US WANTS THAT, just give me a call when you put her back together, I will come down and try it out for you. That way, when someone posts that Neal died happily on a motorcycle as it went up in flames, it won't be the Neal that has to keep Subsim running but it won't be a lie either.

NealT

:rotfl::rotfl:

(My last 2 bikes were S's)

[Letum]

I have had a VFR400 sitting in the garage for 3 years with it's carbs in bits.

One day I will fix it....one day.

[Letum]

Sorry for going OT...
This is redicolous!
The price of a new visor for my helmet is more than the price of a new helmet (inc. new visor). :damn:
I furious!

[Reece]

What! a piece of perspex?:-?

[AVGWarhawk]

Better yet...you are running a risk of not having a safe bike when you are done, I mean the jet fuel you use may leak out get over the engine, and cause a massive fire, burning you beyond all recognition. Now, since NONE OF US WANTS THAT, just give me a call when you put her back together, I will come down and try it out for you. That way, when someone posts that Neal died happily on a motorcycle as it went up in flames, it won't be the Neal that has to keep Subsim running but it won't be a lie either.

NealT

:rotfl::rotfl:

(My last 2 bikes were S's)


We already survived one SS fire for the year. There are no more scheduled. :D

[Letum]

What! a piece of perspex?:-?

Cheapest visor found: £20 +P&P
Cheapest helmet found inc. visor that fits my helmet: £25 + Free P&P
:roll:

[Reece]

I suppose that's typical nowdays! I had a TV tube that had a burnt out heater for the red gun, the store had one instock that they were going to throw out because the TV model is too old to repair, however they would sell it forthe listed $480, I said that's rediculous I could buy a new TV for that, I offered $200 but they refused, so they tossed it!:nope: (wish I knew where) talk about stupid!, that was panasonic, won't buy one of them again out of principal!:shifty:

[Webster]

a nice tip for carb cleaning is to use iso alcohol 90% as your carberator cleaner for soaking parts.

its a very very good cleaner, is safe for hands and the fumes dont hurt your lungs.

its also safe for rubber and plastic so unlike carb cleaner you can soak everything overnight and brush it clean with a parts brush then blow it out with air to finish.


getting enough carb cleaner to submerge your entire carberator is expensive and very toxic so next time you need a cleaning try it out.

the one draw back of it is that it needs an hour or so soak time because it works like a varnish stripper and wont clean on contact like carb cleaner in a can does.

[Task Force]

I suppose that's typical nowdays! I had a TV tube that had a burnt out heater for the red gun, the store had one instock that they were going to throw out because the TV model is too old to repair, however they would sell it forthe listed $480, I said that's rediculous I could buy a new TV for that, I offered $200 but they refused, so they tossed it!:nope: (wish I knew where) talk about stupid!, that was panasonic, won't buy one of them again out of principal!:shifty:

How olds this TV.:lol:

[Webster]

Might be worth checking your needles whilst you have them handy. I have traced
more than one problem engine down to worn needles. The wear can be hard to
spot too.

*edit* If you are really, really lucky a local mechanic might have a jet-testing box.


balanced airflow into the carbs can have a big effect of carb sync as well so make sure both filters are clean and in good condition (im sure you did but i say it anyway just in case it was overlooked)


i was told by a very good bike machanic that i trust, that needles wear down very easy and before its enough to be easy to see, it will have already been effecting how the bike has been running for a long time.

his advice to me was for the price it costs it makes sense to replace the needles and jets whenever you are having carb issues you cant seem to resolve. he said bad fuel air mixtures are more damaging to a bike engine than dogging it.

[Koondawg]

From experience...needles dont wear...they just slide up and down

...what you should make sure of is that the seals ( which look like rubber seats ) are properly sealed...after rebuilding the carbs I would start at closed and open 2 turns then adjust from there...I used to do mine by starting at 2 turns open from close and go 1/4 turns from there....never did the vacuum hose thingy...just by ear
like I said earlier..also if the exhaust is modified...I would bump the jets say from 35 to 37 or 38....


KD

[Letum]

From experience...needles dont wear...they just slide up and down


Believe me, they do.
I have seen hem with bands round them almost half a mil deep.