Front mudguard for 1982 GS1100G question

[paulf]

Any idea if a Suzuki GS450S front mudguard would fit on a GS1100G please?
Seems like they have different front wheel rim size from what i can find online.

[salty_monk]

The 1100G does use the wider rim but I don't think that affects the distance between the fork legs in this case.... I think it's only the GK that has a wider one. I might be wrong.

[oldGSfan]

I sorta doubt you will get much of an answer as that's an oddball matchup. Unless amazingly the serial #'s match. But who is gonna be trying that? Don't buy one if you can't try it. I put a GS850G front fender on the same year GS1000E (79) and it worked out fine - but didn't share the same part number. What's the story, are you looking to buy one sight unseen? What led you up this path that would prevent you from just trying it?

[paulf]

I sorta doubt you will get much of an answer as that's an oddball matchup. Unless amazingly the serial #'s match. But who is gonna be trying that? Don't buy one if you can't try it. I put a GS850G front fender on the same year GS1000E (79) and it worked out fine - but didn't share the same part number. What's the story, are you looking to buy one sight unseen? What led you up this path that would prevent you from just trying it?

I'm located in Melbourne Australia mate and almost impossible to find any parts for these bikes locally so trying to find any fender that might match online.
There is a Suzuki GS450S fender in good nick on Ebay from an OZ seller so just asked him for some dimensions to see if that can work.

[paulf]

The 1100G does use the wider rim but I don't think that affects the distance between the fork legs in this case.... I think it's only the GK that has a wider one. I might be wrong.

Indeed. I do have a 1983 GK and the front forks are wider but I think if you insert some spacers and use a 'G' mudguard, it would work fine on a GK

[salty_monk]

I think the stock front tyre might also be wider on the GK. From memory the standard mudguard has clearance issues with that tyre size.

[paulf]

Here are the dimensions for anyone else looking them up in the future:

GS1100Gk vs GS1100G

Front Rim size: both 19 inch rims and both have a width of 2.8 inches
Fork diameter: 1.8 vs 1.5 inches
Distance between forks: 6.5 vs 6.5 inches
Distance between screws where the mudguard attaches between the forks: 5.75 / 5.3 inches

So yeah there is a difference between the two. Also the rear rim/tire is wider on the GK and also the swing arm is shorter making the bike sit lower.

[paulf]

Finally found a GSX 1100 KATANA front guard that fit nicely. It's some kind of plastic so not sure if it was after market.
Put some primer on it for now before finishing it off properly in due time.

20250803_143207_1-min.jpg

[Grimly]

Looks like a GS1100E mudguard, which were plastic.
Don't forget the internal steel brace.
I fitted one to my 850 and for good measure put a fork brace on top - it handles lovely now.

[paulf]

Looks like a GS1100E mudguard, which were plastic.
Don't forget the internal steel brace.
I fitted one to my 850 and for good measure put a fork brace on top - it handles lovely now.

Thank you mate and yeah internal fender mount bracket will be a bit hard to find here in OZ but hopefully will source one out soon.

The forks are a larger diameter on the GK and also the forks are wider so a brace might be hard to find. Probably will find some aftermarket one though.

Cheers

[Rob S.]

Finally found a GSX 1100 KATANA front guard that fit nicely. It's some kind of plastic so not sure if it was after market.
Put some primer on it for now before finishing it off properly in due time.

20250803_143207_1-min.jpg

That is definitely a 1982/83 piece. And BTW, it's called a "fender."

[rphillips]

I'm like you Rob, when this thread started I's thinking he wanted the little rubber mud flap that goes on the bottom back of the fender. It took a while to realize they don't call them fenders.... Looks good on there though, doesn't it.