6 replies to this topic

[Stormy Normy]

We have just bought a 200 Fantic, seems really fluffy of the bottom end. Cleaned the carb and upped the needle but it didnt really make any difference. Probably all worn so am quite happy to replace but what is the best carb and jetting to go for ?

Also does anyone know haw to age the bike from the frame / engine number and is there anyone in the UK that will write a letter to the DVLA to help get an age related plate ?

Thanks

[fantic200]

the best carb is the one that is on. go onto the dellorto web site and check out what bits you need. I changed the needle(d33), the slide(50) most common cause of poor running, the pilot jet(45) and replaced all the gaskets. then set the pilot screw to 2 and 3/4 turns out, this coupled with a new air filter(dry) helped mine to run spot on. this is cheaper than a complete new carb. all of this advice was given by Bill pye 01642 722378 and he has all the parts in stock. best of luck, mine is a cracking little bike, but i just dont have the time to ride it now.

[totalshell]

to eliminate wear and availability issues buy a new carb, to eliminate jetting trial and error buy from somebody who sets them up for you.. oko from chris at classictrials i fitted one to my fantic and it ran right from the off job done..

[axulsuv]

totalshell, on Jun 20 2010, 05:56 AM, said:

to eliminate wear and availability issues buy a new carb, to eliminate jetting trial and error buy from somebody who sets them up for you.. oko from chris at classictrials i fitted one to my fantic and it ran right from the off job done..

The best route for the least heartache !!!

[Woody]

You can also buy an original spec Dellorto from Dellorto UK (they'll jet it to whatever you tell them) Cost delivered is just over £100. There's always the risk that having fitted new jets, slide, needle etc you find that the carb is generally worn out and the bike doesn't run any better. If you're sure it is the carb causing you the problem, I'd go for a new one rather than servicing it and as the Dellorto is a good carb and they are still available I'd go for that.

Not sure how you date a Fantic from the frame/engine number - Bill Pye is probably best bet for that. The Vintage Motorcycle Club in Burton upon Trent are able to issue dating cetificates that are accepted by DVLA for age related plates. They have details of many trials bikes so may well have Fantic data. If they haven't and you can show them proof of your bike's age (dated sales brochure pictures with pictures of your bike as well) I think they will accept that and issue you with what you need, as it also enables them to update their records with data for bikes they don't currently have. They charge for the service but not much. Google them and give them a ring, they are very helpful and will advise whether they can help or not.

[RTM]

I tried my 125 converted to a 156 yesterday for the first time and that bogged, I think I have read on here this can be caused by a dodgy HT coil. Is your still fitted with the metal cylindrical unit? Mine is so I am changing it.

[Stormy Normy]

Thanks everyone, I have an offer of a carb from a well sorted bike, just for testing. We will give that a go and all being well copy the settings.
Stormy..