Boxerworks.com

I posted this up in K bikes but I don't reckon too many people wander through that section .... so here we go again .
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K75 GS

I've always like K75s , they have an excellent engine ,smooth , powerful and fast . The trouble is I like to ride off road ,not roadless these days or with a bike this heavy but definitely dirt roads .Australia has lots of great dirt rides .

This home built version of the K75 might be the best K75 I've ever seen ,for my use anyway .


Power Weight: Net:
M (about 3 L in the tank = V + H = 90 +115 = 205 KG
P: 75 hp
M / P = 205/75 = 2.73 lbs / hp
LT size: 280 / 100 = 2.8 kg / hp
Gross:
GS: 305/75 = 4.07 lbs / hp
LT: 380 / 100 = 3.8 kg / hp

and yes , it needs a bashplate , preferably a thick one .

http://translate.google.com/translate?h ... rmd%3Divns

Here's a photo ,not of this chap's bike but another .





and another




What do you think of it ?

They're both nice conversion jobs. It's just that the K75 feels so top-heavy in standard trim that it would be my last choice for a GS conversion.

Yeah ,a good comment .It's just that it's a beautiful engine , one of my favourites. 75 hp ands 67 mpg Imp .I like good fuel economy and that's really one of my complaints against my ST.Half as much fuel again as a K75 and 2/3 the hp .

What gearing options are there for K bikes? Stock might be a bit tall.

K bikes are getting pretty cheap and R GSs are getting awfully expensive.

Garnet wrote:What gearing options are there for K bikes? Stock might be a bit tall.

K bikes are getting pretty cheap and R GSs are getting awfully expensive.

Yes , that could be a real short coming .A K75 diff is 37/11 ,the gear box final or 4th anyway would be 1:1 wouldn't it ?

I know it's just a well-done Photoshop, and not even close to a G/S, but...

My ,my , wouldn't that slip along !

Sibbo wrote:

Garnet wrote:What gearing options are there for K bikes? Stock might be a bit tall.

K bikes are getting pretty cheap and R GSs are getting awfully expensive.

Yes , that could be a real short coming .A K75 diff is 37/11 ,the gear box final or 4th anyway would be 1:1 wouldn't it ?

Woops ...I'm wrong .This conversion uses a R1100GS rear end .It should be quite good with those ratios .The forks are R100GS.Reading up on the R1100GS rear ,it seems to be the preferred conversion for R1150 owners who are tired of stalling .

Final drive...3.0:1 (33:11)

Power Weight: Net:
M (about 3 L in the tank = V + H = 90 +115 = 205 KG
P: 75 hp
M / P = 205/75 = 2.73 lbs / hp
LT size: 280 / 100 = 2.8 kg / hp
Gross:
GS: 305/75 = 4.07 lbs / hp
LT: 380 / 100 = 3.8 kg / hp

About the same weight as my ST but 25 more hp .

I can understand the love of a fine engine. But for a modern parts full available bike...I might look at this triple as well. It is proving to be the BMW R800GS killer. The 800 cc engine will deliver a few lees horse power than in the Dayton model (where it delivers 124bhp and 53lb/ft). SO, with a total weight of 440lbs and a power of aprox. 110 HP, the Triumph 800 will be lighter and a little more powerful than the BMW F800GS. With a price point around 10k - makes the bike seem reasonable in comparison. Built in Thailand (as will Ducati this year) these bikes represent a new direction for "European motorcycles".