Carb synchroniser

[yazkenya]

Hello. I have an rd07a. I am looking to purchase a carb balancing kit. Could anyone please recommend a good make that they have used on @. Never used one before so I would appreciate feedback please.

[jamie92j]

i have one and forget the brand, but even though the bike i was using it for had 2 carbs, i got the one that can do 4 carbs!

my thinking was that it should last a good while and i never know what future bikes i will have so left my options open......

[YEN_POWELL]

I've got a mercury type Carbtune. It's the 4 cylinder model (from when I had an FJ1200) but it works fine on the AT.

[Zenarchy]

Still haven't found the time to do mine yet, but from what I could gather reading online when trying to work out which ones to get, the general theme was that the mercury guages (if you can get hold of them second hand - don't seem to make them any more), carbtune (which I think used to use mercury but now uses metal needles), or twinmax (http://www.twinmax.co.uk/acatalog/info_13.html) are said to be better than the clock style guages

Hein Gericke have a sale on at the moment for their carb tuners at £31 (reduced from £50) : Hein Gericke (UK) Ltd.

But they're the clock style guages. I'm not sure how much of a difference there is in reality though, so they may be fine (I read at least one recommendation for them here somewhere).

[Boris]

But they're the clock style guages. I'm not sure how much of a difference there is in reality though, so they may be fine (I read at least one recommendation for them here somewhere).

I don't like clock style gauges as the ones I have used bounc around a bit and they are harder to read and compare than the parallel columns of a mercury or steel bar type gagues. I use a Morgan Carbtune and pretty good it is too. Only real problem is they don't all read exactly the same but it only takes a second to put all 4 hoses, one a time, on the same cylinder and note the difference. One of mine reads a fraction high and another low but the two middle ones are spot on so that's the ones I use for twins.

If you can find mercury gauges go for it but be careful as blipping the throttle too fiercly can have the mercury disappearing down the pipe and into the engine.

Morgan were fantastic for service as I ordered them at 4pm and they were here by 9am the next day. Not bad from Ireland to Scotland. It was about 15 years ago so things may have changed since then though

[Zenarchy]

I read that the bouncing needles are something to do with needing damping on the pipes (the hein gericke ones have little thumb screws for this looking at the pictures, but I've noticed many don't). I'm not quite sure how this works though (apart from restricting the air flow slightly) and how you'd ensure both are tightened exactly the same to keep things in balance. I think on the ones without those screws you can improvise something to perform the same function.

I'll probably end up going for the carbtune ones eventually as they seem to get a lot of good reviews, and as you say, comparing two bars side by side seems easier than reading a circular guage.

[Windmill John]

I do hear a lot of good comments about Carb tune, but I have had Davida gauges for a long time.
I originally had a dual set, but changed it for a four set.
It has done three Bandits, my oil head GS, my airheads and a ZZR.
It is damped, but yes you do get a little needle bounce, but as they all bounce slightly, the reading is still constant across all cylinders.
I also found the customer service at Davida to be absolutely superb.
No, I don't work for them

[steinberg]

I have a Morgan Carbtune II which is simple to use and seems to give good results - recently done the carbs on my 4-cyl. Yamaha XJR and throttle response is nice & smooth. I'm sure it's more robust than the dial type gauges and is well damped. Used to have the original mercury version which was also good but is, I guess, now a museum piece. Looking at the Carbtune site www.carbtune.com I see Carbtune II has now been superceded by Carbtune Pro. which looks very similar.

[btbloke]

I use a twinmax.

[YEN_POWELL]

I don't like clock style gauges as the ones I have used bounc around a bit and they are harder to read and compare than the parallel columns of a mercury or steel bar type gagues. I use a Morgan Carbtune and pretty good it is too. Only real problem is they don't all read exactly the same but it only takes a second to put all 4 hoses, one a time, on the same cylinder and note the difference. One of mine reads a fraction high and another low but the two middle ones are spot on so that's the ones I use for twins.

If you can find mercury gauges go for it but be careful as blipping the throttle too fiercly can have the mercury disappearing down the pipe and into the engine.

Morgan were fantastic for service as I ordered them at 4pm and they were here by 9am the next day. Not bad from Ireland to Scotland. It was about 15 years ago so things may have changed since then though

Do you have the mercury type. If so your difference in readings may just be bubbles in the non transparent part, cured with the use of a syringe to pull the air to the top.