Carb Engine Intake Pipes

[RoyalFlush10]

Ok here's a quick question for you guys and hopefully you have a quick answer.

To connect the carbs to the cylinder head you have 4 cylinder head intake pipes. That are all marked with a part number and then a "L" or a "R" for left or right.

Now I have read the service manual and it states to put the made in japan side on the cylinder head side. No problem.

Here's the question. Should it be L, L, R, R from left to right if you were looking at the cyinder head intakes from the rear or should it be L, R, L, R or some other combo?

Any Ideas?

[Nessism]

L = Left side
R = Right side

So L, L, R, R is correct. And don't forget to use new O-rings!

[chiphead]

[quote=RoyalFlush10;526611]
Now I have read the service manual and it states to put the made in japan side on the cylinder head side. No problem.
quote]
Can you explain this? I really don't understand that statement. Maybe I'm just unusually dense today.
Thanks.](*,)

[RoyalFlush10]

L = Left side
R = Right side

So L, L, R, R is correct.

thanks

And don't forget to use new O-rings!

I'm not sure my bike has these. Can you be more specific?

Can you explain this? I really don't understand that statement. Maybe I'm just unusually dense today.

on the rubber on one end is stamped "Made in Japan" and in the Service Manual it says to make sure that the "Made in Japan" is on the cylinder head side not the carb side.

You can find a mostly completed PDF of the GS750 service manual on my website in my signature. (still under contruction)

[Nessism]

I'm not sure my bike has these. Can you be more specific?

There is a large diameter O-ring between the head and each carb boot. Check the parts diagrams at Bike Bandit or similar for the part number.

[bwringer]

Is your bike a 16-valve model with intake boots that look like short pieces of radiator hose?

OR...

Is it an 8 valve model with flanged intake boots?

If it's the latter, these instructions should help...

http://bwringer.com/gs/intakeorings.html

And yes, it's LLRR either way.

In general, whenever there is a relative direction, like "left", "right", "top", "bottom", "front", "back", etc. mentioned in a procedure or stamped on a part, it is from the perspective of a rider or driver in the normal operating position.

Therefore, the cylinders are numbered 1,2,3,4 from left to right. Left is on the rider's left, not necessarily the left of a mechanic, who might be standing anywhere.

This is usually pretty easy to keep straight on motorcycles, but it can get a little confusing in the car world, since you're normally working on the engine from the front, facing the rear. You have to remember that left means the driver's left. And on cars, the cylinders are always numbered counting from the accessory end to the transmission end, so this can get strange if the transmission is on the left.

An arrow on a part means it should be installed with the arrow pointing towards a matching arrow on the mating part. If there's no matching arrow, then the arrow points to the front or top, depending on orientation.

There are lots of little bits of mechanical language like this...

[chef1366]

He has a 16 valve so no o-ring. I turn the intake pipes until the end is straight up and down without angles. Left and right sitting on bike.

[RoyalFlush10]

Yep this is the 16 valve, the intake boots look like "short radiator hoses"

Yeah I understood about the Left to Right numbering sceme its just that the PO had the setup as LRLR and the wrong sides facing the engine, so the carbs were jacked up like they were on a racing bike with about a 20 - 30 degree angle.


Thanks for all the replys