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need header bolts!

  • Thread starter Thread starter buckshot gumbo
  • Start date Start date
B

buckshot gumbo

Guest
I have an 82' 1100 that has a supertrapp exhaust system. Im having a heck of a time finding new manifold bolts, or their dimensions. These are the 8 bolts that hold the exhaust manifold to the head. I wanted to make sure I got the correct ones rather than a "close is cool" sort of thing...
Any help would be greatly appreciated!
 
Check the parts fiche at Alpha:

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That says the manifold bolts are part no. 07130-0845B, unless you have a different GS1100 (the other fiches are there too).

http://www.alpha-sports.com/suzuki_parts.htm

The part nos. have the dimensions built into them. So that bolt IIRC is 8m x 45mm. BassCliff has information abut deciphering parts nos. for bolts.

See - http://members.dslextreme.com/users/storagecliff/images/engine_odds-n-ends.html#A09

Generic Bolt Sizes From Suzuki Part Numbers (Thanks to Mr. bwringer)

The lengths of the screws are embedded in the Suzuki part number, so you can usually figure them out from a fiche.

Here's an online fiche with real part numbers:
http://flatoutmotorcycles.com/fiche_select.asp

As an example, on the clutch cover on a 1978 GS750, it appears to use two 6mm thread X 55mm length screws and eight 6mm thread X 20mm screws.

The 6X55mm screws:
Part #: 02112-06557

The 6X20mm screws:
Part #: 02112-06207

Note the first four digits in the second half of the part number.

In case you're wondering, you always leave the head out when you measure fasteners. The diameter is the width of the threads (NOT the size of the wrench or bolt head), and the length is the shank measured from under the head to the tip.

Phillips head (cross head) screws are just sick and wrong -- a terrible joke. I hate them.

Standard 6mm hex head bolts have 10mm heads, and are too big to be used on GS cases.

Allen head stainless steel screws (with antiseize applied) are the only way to go, unless you must have absolute historical accuracy. Regular steel rusts instantly.

You can also buy stainless allen head screws in bulk from several places. My favorite is McMaster-Carr:
http://www.mcmaster.com

I've also ordered from MMS:
http://www.mmsacc-stainless.com/


A couple of updates to that:

Another great source for stainless bolts is: http://boltdepot.com

Suzuki uses standard metric thread pitches up through 8mm:
3mm x .5
4mm x .7
5mm X .8
6mm X 1
8mm X 1.25

When you get to 10mm fasteners, Suzuki usually uses fine pitch threads:
10mm X 1.25
12mm X 1.25

But when you get to fasteners this size, you don't really want to replace them with stainless anyway -- best to stick with the original fasteners. Stainless is strong, but brittle, and it's not a good idea to use it in heavily loaded suspension, frame, or brake components.

Suzuki brake banjo bolts are 10mm X 1.0mm threads.
Click to expand...



HTH
 
I have a set of stainless allen bolts that I bought with lock washers and ended up not using. One of my holes was stripped out and I had to install studs. If you are interested $12 shipped.
 
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