Throttle body screw; screw driver recommendations

[Puregreen59]

Hi,

This might sound like a crazy question to ask, but what screw driver is everyone using for throttle body syncs, it's a small flat head right?

I took it apart last night, for a throttle body sync after finding and fixing a vacuum leak last week, and noticed strangely enough either it was masking the vibration because I was so focused on the primary issue or that the vacuum leak was somehow keeping it in sync even though it was out? I don't know.. 😂😂

 

While doing the sync I find One of the screws, the one I needed to adjust was absolutely stuck. 

I tried every bit and driver I had till I found one that fitted best, but it still didn't fully fill the space, and to my impatience and frustration, ended up totally stripping it out, 

 

My question would be what is every one using? Is there a "perfect fit" tool apart from the official wayyy to expensive yamaha tool

 

And has anyone had experience with a stuck screw and how could I have gone about it any differently for the future, what's the best preventative method, can I Lube it up, prehaps copper grease or is that a big no no incase it gets past in to the cylinder somehow? 

 

Cheers! 

Edited June 15, 2021 by Puregreen59

[Heli ATP]

Did you do the JIS?

Japanese Industrial Standard

[Puregreen59]

38 minutes ago, Heli ATP said:

Did you do the JIS?

Japanese Industrial Standard

Ah... so I need to find a JIS Flat head

[Puregreen59]

Seems to be a struggle finding a kit with flat heads, I saw there's options on the link you gave, but was hoping to find some local (UK) any idea what size JIS flat head it is? I found this set on ebay, but it only has one flat head labeled "6"

[petshark]

I used these:

https://www.amazon.co.uk/-/en/gp/product/B07SQGJCP7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Really love 'em

[dazzler24]

2 hours ago, Puregreen59 said:

Hi,

This might sound like a crazy question to ask, but what screw driver is everyone using for throttle body syncs, it's a small flat head right?

I took it apart last night, for a throttle body sync after finding and fixing a vacuum leak last week, and noticed strangely enough either it was masking the vibration because I was so focused on the primary issue or that the vacuum leak was somehow keeping it in sync even though it was out? I don't know.. 😂😂

 

While doing the sync I find One of the screws, the one I needed to adjust was absolutely stuck. 

I tried every bit and driver I had till I found one that fitted best, but it still didn't fully fill the space, and to my impatience and frustration, ended up totally stripping it out, 

 

My question would be what is every one using? Is there a "perfect fit" tool apart from the official wayyy to expensive yamaha tool

 

And has anyone had experience with a stuck screw and how could I have gone about it any differently for the future, what's the best preventative method, can I Lube it up, prehaps copper grease or is that a big no no incase it gets past in to the cylinder somehow? 

 

Cheers! 

Don't know about your model but on mine (2015) the screws are just the flat blade type?!  See pic below.

One of the screws is the master (the white painted one on the far right in my case) and should be left untouched (generally) as it is the reference for the other two.

Mine were very easy to turn FWIW and there was zero risk of stripping.

[Puregreen59]

3 minutes ago, dazzler24 said:

Don't know about your model but on mine (2015) the screws are just the flat blade type?!  See pic below.

One of the screws is the master (the white painted one on the far right in my case) and should be left untouched (generally) as it is the reference for the other two.

Mine were very easy to turn FWIW and there was zero risk of stripping.

I also have the 2015 model, if where looking at your picture the one that was stuck was the far left one

[dazzler24]

2 minutes ago, Puregreen59 said:

I also have the 2015 model, if where looking at your picture the one that was stuck was the far left one

So was it the painted one in your case?

[BBB]

5 hours ago, Puregreen59 said:

Ah... so I need to find a JIS Flat head

Nope. JIS is about the cross head type of screw.

It’s strange to find the screw so stuck, especially with a brass screw.  I can only think that the previous owner overtightened it and jammed it in.

[Puregreen59]

7 hours ago, dazzler24 said:

So was it the painted one in your case?

Nope not the painted one, 

 

3 hours ago, BBB said:

Nope. JIS is about the cross head type of screw.

It’s strange to find the screw so stuck, especially with a brass screw.  I can only think that the previous owner overtightened it and jammed it in.

Hmm OK 

[micah2074]

I just use a skinny flat head. 

[coachluciano]

Wood screw screwdriver. That head is identical to a brass wood screw. If I can find mine I’ll shoot a picture. I have a set of them

[peteinpa]

They are only brass into alluminum threads. How could it get so tight?  

[Puregreen59]

11 hours ago, peteinpa said:

They are only brass into alluminum threads. How could it get so tight?  

I'll be honest I'm not really so so on the composition of metals, but I'm assuming your suggesting that that pick this combination so this doesn't/shouldn't happen? 

 

Could it possibly be to hot?

I use this bike almost every day, when I'm not riding for pleasure I also use it for work on delivery work, so there's a lot of on off and sitting at traffic lights prehaps this could be causing a problem? 

[peteinpa]

I just know since 1980, my beginning of wrenching, carbs have been alluminum, screws, jets, etc. have been brass.

I can't see how it got that tight it can't be loosened with any decent screwdriver.

If yoy want a precice fit, gunsmith screwdrivers are good also.