Can't balance my throttle bodies.

[(RIP) Jamie]

I did a little while ago, and all seemed fine, just a quick nip really. Despite the increase in pick up, it was still a little lumpy. And the tickover was a touch low.

So today I've adjusted my valve clearances, including the rocker end floats, which were fine. But when I pulled out the plugs, the lefy hand side was fine, but the right was cocked. I cleaned returned the plugs (swapping them over), and readjusted my throttle cable, it's the bastard single one.

Anyway, I've attached the Robotronic, and the L/H body is sucking the oil straight in, without a moments hesitation.

I've removed the brass adjuster screws, cleaned and replaced, and basically fettled everything, but still the L/H body is monstering the R/H body. I've even closed off the L/H and fully opened the R/H, same result, with all variations in between, I've even disconnected the L/H pipe, and let the R/H have it's way, which it did, but not as fiercly as the L/H.

I'm confused now, both cylinders are firing, and the bike seems to tick over fine. I can only think it's something to do with the throttle cable, I've adjusted it as in the manual, no play on R/H, no play on L/H "out" about half a mm L/H "in"

Is there an order in which you should fit and adjust, or does anybody have any other ideas?

 

[dragontest]

Hi,
I tried to balance mine yesterday and suffered the same ... left hand sucked all of the oil out of the manometer every time... totally confused over it all, as I don't get enough time to play with the right hand BBS to get them to sync.
I wish you luck at finding a fix to the problem, I'm having to ride mine as it is till I find a fix. Is yours an old or new set up with the cables?

 

[(RIP) Jamie]

Mines the old cable set-up. I'm going to get new plugs tomorrow, as the others are old.

I'm convinced it's the cabling though, as at one point the R/H body wasn't firing properly.

It just seems at the moment I've got the cable (singular) adjusted right out allowing for no more adjustment for stretch, the cable is less than a year old.

 

[Steptoe]

, it's the bastard single one.

It's an art to balance the single cable set up, takes a lot of practise. Thats why BMW changed the set up

The ones i get in are never set up correctly. They're usually idling on the throttle cable tension and not the idle screws, because the previous adjuster can't get them balanced at idle or under load, so they end with just making a bodge up .

have you slackened off the L/H side adjuster to the R/H side

 

[(RIP) Jamie]

have you slackened off the L/H side adjuster to the R/H side

Welllllll, yes and no. In the book it says there should be no play in the last two adjustments, and about half mm in the direct. So I suppose technically no.

I can kind kind of get my head around the principle, but it's the order of adjustment bogs me down.

I.E. having the adjuster from the grip at half a mm play, the other two with no play, so that effectivley both throttle bodies open up in unison. But by starting the procedure at adjuster 3, you seem to be saying that this could falsley leave the R/H body openohI'vegonecrosseyed.

It's a feckin fiddle for sure.

 

[Comfy Old Boots]

I did a little while ago, and all seemed fine, just a quick nip really. Despite the increase in pick up, it was still a little lumpy. And the tickover was a touch low.

So today I've adjusted my valve clearances, including the rocker end floats, which were fine. But when I pulled out the plugs, the lefy hand side was fine, but the right was cocked. I cleaned returned the plugs (swapping them over), and readjusted my throttle cable, it's the bastard single one.

Anyway, I've attached the Robotronic, and the L/H body is sucking the oil straight in, without a moments hesitation.

I've removed the brass adjuster screws, cleaned and replaced, and basically fettled everything, but still the L/H body is monstering the R/H body. I've even closed off the L/H and fully opened the R/H, same result, with all variations in between, I've even disconnected the L/H pipe, and let the R/H have it's way, which it did, but not as fiercly as the L/H.

I'm confused now, both cylinders are firing, and the bike seems to tick over fine. I can only think it's something to do with the throttle cable, I've adjusted it as in the manual, no play on R/H, no play on L/H "out" about half a mm L/H "in"

Is there an order in which you should fit and adjust, or does anybody have any other ideas?

replace injectors? is your tps unrelaiable?

 

[(RIP) Jamie]

Finally got round to sorting it.

It were very frustrating, but please read the tips below to make it easier for you.

 

[Trippy]

Finally got round to sorting it.

It were very frustrating, but please read the tips below to make it easier for you.


1. Don't eat for a month and save some money.

2. Take to a BMW dealer.

.....