Pilot screw seized

[davebiker]

Hi, got my bike out of the garage recently after several months without use and it would not idle. Sounded like a fuel problem (fuel probably too old) so I tool the carbs off to clean them. I removed the pilot screws from carbs 2, 3 and 4 easily but the one in carb1 seemed to be seized. When I applied some force with a screwdriver the four quarters of the head just broke off.
Has anybody else had this problem? Should I buy an extractor set you see advertised and use this after drilling into the screw?
Or should I just leave it where it is and hope it is ok? I don't really want to put everything back and then find it is still not running properly.
I would be grateful for any advice.
Dave

[Disorderlypunk]

im sure this just came up last week
i had same problem on a different set of carbs- i went round my local hardware shop and just bought a cheap set of extractors and used the smallest one and put a good amount of pressure on as i turned it anticlockwise, i didnt even predrill it - just put a small phillips in there gave it a smack and then turned it to create a center punch type indent (always drill after a center punch to make sure its centre and dont go too big)

[Northern Biker]

Had the same problem with mine and they weren't for coming out. Ended up buying another set of carbs.

[Disorderlypunk]

Had the same problem with mine and they weren't for coming out. Ended up buying another set of carbs.

should have brought them to me - im only up in preston lol

[cl1ve2004]

I ended up taking mine to a local professional carb restorer..£70 but he got the bugger out perfect..

[Northern Biker]

should have brought them to me - im only up in preston lol

I've still got them pal 

[davebiker]

Thanks for your replies. Decided I will have a go at drilling the screw out and using an extractor.
I had a bad experience years ago when the extractor just broke off in a screw so I haven't tried it since.
The screw is less than 5mm diameter so I am looking for a left handed 2mm drill bit and a small extractor.
Just searching on the interweb now..
Cheers, Dave

[davebiker]

Hurray, I got the pilot screw out with a £7 extractor set from a bargain store.
Even the spring, tiny washer, and tiny o ring came out too.
So I just need to buy a new pilot screw set from Yamaha for £40 or look secondhand on ebay.

[cl1ve2004]

Try NRP in Manchester for the screw,they sorted me with an equivalent one cheap as chips...