Carburettor synchronisation
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
Carburettor synchronisation
Hi, just wanted to ask if anybody has got some experience with the Carbtune II instrument?
I was thinking about buying one, but am uncertain. I also have a Triumph Bonnie 650 -67 model which requires frequent synchronisation, so it will also be used for that. I see that it gets good reviews.
Thanks for any comments...
I was thinking about buying one, but am uncertain. I also have a Triumph Bonnie 650 -67 model which requires frequent synchronisation, so it will also be used for that. I see that it gets good reviews.
Thanks for any comments...
I have one of the original John Morgan Carbtune wid Mercury in them...works fine although a little toxic if yer not carefull. Sure the new one will be just a good.
Cheers
Ian
Cheers
Ian
Cumbria - It may be quiet but it has some of the best roads in the world :-)
98 VTR1000 Firestorm in Yellow - Micron Race carbon cans, Ohlins shock, Revolution Fork upgrade.....
94 Mitsubishi Evo2 - 2.3stroker @ 1.8 bar, 400bhp & 420 Ft/lbs..eeek
98 VTR1000 Firestorm in Yellow - Micron Race carbon cans, Ohlins shock, Revolution Fork upgrade.....
94 Mitsubishi Evo2 - 2.3stroker @ 1.8 bar, 400bhp & 420 Ft/lbs..eeek
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
Thank you for the advice, but I ordered the Carbtune on Wednesday and received them in my briefcase on Saturday. Haven´t tried them yet, but you have to keep them vertical so that the rods don´t get additional friction from the guides I think... Anyway had only the guys I ordered the other parts from had the same mail order service...
Last edited by petrolhead on Sun Sep 07, 2003 6:06 pm, edited 1 time in total.
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
I used my new Carbtune today .
Easy to set up and use, but I experienced that the readings (taken from the same cylinder) altered from column to column, so that you have to take that into account when you synchronise the carbs. I.e if you just synchronise the carbs and do not check it changing the tubes / columns on the Carbtune it can be that the result will not be correct or any better than before the synchronisation.
This is how it looked after synchronisation.
All readings taken at 1100RPM.
Front sylinder on column 1 (left) and rear cylinder on column 2.
After changing the tubes / columns on the Carbtune.
Now rear cylinder on column 1 and front cylinder on column 2.
The difference in the readings must have something to do with the calibration of the Carbtune, and must be adjusted for when synchronising.
I then wrote down the readings and adjusted it so that the readings were similar on the same column and cylinder after changing them.
The picture shows front cylinder on column 1.
(rear cylinder on column 2)
The picture shows rear cylnder on column 1.
(front cylinder on column 2)
I hope my explanation is possible to understand, otherwise please excuse my poor English.
Easy to set up and use, but I experienced that the readings (taken from the same cylinder) altered from column to column, so that you have to take that into account when you synchronise the carbs. I.e if you just synchronise the carbs and do not check it changing the tubes / columns on the Carbtune it can be that the result will not be correct or any better than before the synchronisation.
This is how it looked after synchronisation.
All readings taken at 1100RPM.
Front sylinder on column 1 (left) and rear cylinder on column 2.
After changing the tubes / columns on the Carbtune.
Now rear cylinder on column 1 and front cylinder on column 2.
The difference in the readings must have something to do with the calibration of the Carbtune, and must be adjusted for when synchronising.
I then wrote down the readings and adjusted it so that the readings were similar on the same column and cylinder after changing them.
The picture shows front cylinder on column 1.
(rear cylinder on column 2)
The picture shows rear cylnder on column 1.
(front cylinder on column 2)
I hope my explanation is possible to understand, otherwise please excuse my poor English.
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
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- Posts: 47
- Joined: Sun Jul 27, 2003 7:56 pm
- Location: No(r)way
I contacted Carbtune and their reply can be read below.
Very correctly they refunded me the cost of the Carbtune.
Good service.
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Thanks for your email and sorry for the problem with your Carbtune. We sell thousands of the Carbtune and it is very rare that we have any problems with them. Probably a few a year. We are human and occasionally make mistakes in the assembly. Sometimes it's damaged in the post. It is very rare but you just got a faulty one. Sorry.
If you look at the website you will see that random samples of the Carbtune have been tested in an independent testing laboratory and were the most accurate multi-gauge device tested. More accurate than any dial gauges, even expensive ones.
Very correctly they refunded me the cost of the Carbtune.
Good service.
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Thanks for your email and sorry for the problem with your Carbtune. We sell thousands of the Carbtune and it is very rare that we have any problems with them. Probably a few a year. We are human and occasionally make mistakes in the assembly. Sometimes it's damaged in the post. It is very rare but you just got a faulty one. Sorry.
If you look at the website you will see that random samples of the Carbtune have been tested in an independent testing laboratory and were the most accurate multi-gauge device tested. More accurate than any dial gauges, even expensive ones.
I have used carbtune on a number of 4cyl bikes with no problems. Found it easier personaly to use than a dial gauge, althought thats down to personal tast. I have not tried it on the the Storm. I have just overhauled the carbs and installed a dynojet kit I must give it a try when I get them back together.