Deadly_Viper wrote:nope its not that, they are just so old and stuck that its mashed the metal. going to get some pliers on them and failing that cut a groove across them.

It is exactly that. Many people don't seem to be aware of the fact but

The screws are a JIS (Japanese Industrial) standard, I can't think of the number. not phillips or cross-head. From memory theres #2 on the float-bowls.

A Philips #2 will damage these screws, especially if they are tight, the result is that the head gets stripped apart.

The driver fits but not perfect, if you use a JIS #2 the screwdriver will fit perfect and not damage these screws, i've taken apart many NC24 carbs, even ones with old hardened screws and not broken any using the proper gear.

Some european screwdrivers do a better job than others but you see so many people wrecking the screws on Japanese bikes, best to get the right tools for the job

http://centralhobbies.com/tools/jis.html

Why you need Japanese Industrial Standard screwdrivers...

Improper screwdriver fit strips out screw heads, wastes valuable time, and makes hard work out of something that should've been rewarding.

When working with model airplanes, electronics, robotic servos or other equipment manufactured according to precision specifications, you need the proper tools. Always use the right tool for the job.

Japanese and other precision-made Phillips' head screws require screwdrivers that meet precise Japanese specifications, but many common American and European screwdrivers don't meet those specs. Our JIS screwdrivers do. They'll save you time, money, and needless frustration.

Gosh, I didn't know that, I thought a screw was a screw :S
I shall see if I can track down some of these screwdrivers...

Deadly_Viper wrote:Gosh, I didn't know that, I thought a screw was a screw :S
I shall see if I can track down some of these screwdrivers...

Many people don't.

I striped an NC30 set of carbs today and reassembled without wrecking any screws.

The screws have a small dot on them, this indicated they are not philips but a JIS size.

I recently saw about the JIS bits, someone was working on a Suzuki GS650GT and noticed the dots on all of the screws and wondered what they meant, when told they suddenly realised why alot of the screws rounded (apart from the bike being sat for 20 years!)

BillingCBR wrote:I recently saw about the JIS bits, someone was working on a Suzuki GS650GT and noticed the dots on all of the screws and wondered what they meant, when told they suddenly realised why alot of the screws rounded (apart from the bike being sat for 20 years!)

Well my NC30 is 22 years old and the carbs were all factory so dont think they were messed with.

They came apart easy with the right screw-driver.

:-)

Does anyone know where to get a set of JIS screwdrivers easily that's not a website? Would a RC model place be a good start?

Deadly_Viper wrote:Does anyone know where to get a set of JIS screwdrivers easily that's not a website? Would a RC model place be a good start?

Give Drew (Moriwaki man a shout)

He'll be able to get you a set and sizes to fit your budget.

MART you broke my expensive brandnew screwdriver, Remember?

i pass Neo, a brand new Wera Stainless Steel Kraftform Screwdriver No#2 Phillips never been used and SNAP a diamond tipped screwdriver broke on its debut, thank fuck for quality tools and lifetime waranties,

i gotta contact them to get it replaced :D just in case you didnt believe me when i said they wernt cheap heres an ebay link, i got them for free i wont them in a prize draw lucky me hey!

http://www.ebay.co.uk/itm/Wera-25-Piece ... 3682wt_941

porndoguk wrote:MART you broke my expensive brandnew screwdriver, Remember?

i pass Neo, a brand new Wera Stainless Steel Kraftform Screwdriver No#2 Phillips never been used and SNAP a diamond tipped screwdriver broke on its debut, thank fuck for quality tools and lifetime waranties,

i gotta contact them to get it replaced :D just in case you didnt believe me when i said they wernt cheap heres an ebay link, i got them for free i wont them in a prize draw lucky me hey!

http://www.ebay.co.uk/itm/Wera-25-Piece ... 3682wt_941

No wonder they were free.. the tip came off that one like it was made from chocolate.

Neosophist wrote:

porndoguk wrote:MART you broke my expensive brandnew screwdriver, Remember?

i pass Neo, a brand new Wera Stainless Steel Kraftform Screwdriver No#2 Phillips never been used and SNAP a diamond tipped screwdriver broke on its debut, thank fuck for quality tools and lifetime waranties,

i gotta contact them to get it replaced :D just in case you didnt believe me when i said they wernt cheap heres an ebay link, i got them for free i wont them in a prize draw lucky me hey!

http://www.ebay.co.uk/itm/Wera-25-Piece ... 3682wt_941

No wonder they were free.. the tip came off that one like it was made from chocolate.

it was a one off for sure, i use the same bits in my impact gun and not had one snap YET!

just emailed them and they sending a replacement :D