Outta make your nuts burn! haha Think of the heat coming off that turbo!

 

Imagine the chain/sprocket/tyre wear rate :scared:

it'd be a joke to hang on though !!

:lol::lol:

 

Motard Hayabusa...............hmy:

 

Im looking for more info on the idea about turbo LC4 motors.
Does anyone have any data to contribute
Bolder did you study it out?

I found these guys doing a kit for KTM dirters
http://aerocharger.com/turbo-systems/motorcycles/ktm-turbo-system/

 

Watched the link. Looks like a mountain of fun. I have toyed a lot with turbo's, but not many on bikes.
I wonder how long you would get out of the bottom end of an lc4.
Jap 4 pots handle it pretty well, but there not hard on there cranks like a single. I was racing at a meet a few years ago where there was a yzf 450 turbo, so I got to see it first hand and it did work. Pictures of that bike below.
I gather you are putting it on an injected lc4?
I personally don't know of any kits, but making something up shouldn't be impossible.
I would be very interested if you decide to venture down that path. Can't see the turbo on the bike below but you can probably tell by the tubing.

 

The thoughts are based purely on hobby time.
Ive done a little bit of pro cons thinking.
Even if i never do it im going to get into this stuff. Sold all my bikes and got married back in the day , worked 12hr a day for 6 years straight , yeah im an aussie and i flog the jobs like i did the torana back in 1990's..
But now i was able to slip in a little toy called the 690 0
Its super fun bike and gutsy even if i am 115kg and on the wrong side of 40.

Everytime i ride it though i think, hmmm , cam it, high comp piston, modify the map , re do the inlet setup.
70-75HP that would let me install the 40tooth sprocket .
Then i think hmmmm 950 supermoto 97HP of street legal , why am i thinking this way , if the wife knew she would close me down.

Then i thought turbo, oww yeah 150KG bike with low boost 85HP setup of illegal-ness.

 

I know this much, Cors and DW.

The LC4 690 has been reliably tuned to 115hp by carburetion, so I am sure the crank is good for it.

Many singles have been turbo'd, The Tube is full of examples of them, so it is possible.

I am don't have much experience tuning apart from fiddling with carburetion, so I'd be naff at fitting and tuning a snail - but I'd fcuken love to.


Wot's an Aussie doing in Helsinki?

 

Wot's an Aussie doing in Helsinki?

I dont even know how i got here , strange turn of events i guess.

 

Probably not worth the money, however seems your injected it's not as difficult. You probably won't be able to insure it though.

It would be easier to get a 990 or 1290 duke, then you got all the balls you need.
That's what I want as my next roady. Damn japper won't blow up and I fill it full of hate every day. The missus won't let me upgrade until it dies or I sell another one of the ktm dirt squirters and thats not going to happen.

115hp out of single Boldor, how much fun would that be!

 

You probably won't be able to insure it though.

It would be easier to get a 990 or 1290 duke, then you got all the balls you need.

Insurance -very true,

 

I was talking to a Pom on the web, he's into SM690's. He tells me they sell kits to mount the LC4 690 into small desert-racer/dune buggy things, and he reckons their reliable too. Of course, you're gunna need a new wiring loom and I think this was for single-spark LC4's. Of course, the loom for a buggy isn't going to work too well on the Duke. It'd be a brave backyard engineer who tried to convert the twin-spark LC4 into a carbie fuelled engine. But if anyone put together a conversion kit for switching over to a carbie Duke IV, I'd be into it up to my ears.

Insurance?? Are you on glue?? I bought the Duke, so that I could set it up to be essentially crash-proof; one of the primary reasons for buying a small single naked, was to make it indestructible and wave goodbye to comprehensive insurance. I only insure 3rd party property - it's like a hunjy annually.


And I'd be interested in a snail IF someone had done it before me and ironed out the bugs and knew the pitfalls. I go down that road over an SD because even the 990 is a handful of bike to throw around. The Duke is just so tiny, around town and through traffic and up narrow lanes and stuff: well it's a bank robber's bike essentially. I don't want a big bike anymore.

 

It'd be a brave backyard engineer who tried to convert the twin-spark LC4 into a carbie fuelled engine. But if anyone put together a conversion kit for switching over to a carbie Duke IV, I'd be into it up to my ears.

Lyndon Poskit does it on his 690s for travelling around the world.he converted few bikes to Carbie
he also recently put a big bore kit on it in Adelaide, not sure if its similar one

http://www.frauenschuh-tuning.at/index.php?id=ktm_lc4_690

maybe easier option than turbo

 

No mate, glue gets stuck in your nose hairs, paint thinners works much better.:wink:
I lot of insurance companies won't 3rd party fire and theft if the bikes worth more than 5 grand. My old one use to, but was only $80 cheaper than my current one with full comp.

 

I didn't say 3rd party, fire & theft: I said 3rd party property only.

3rdPP&T is rarely much cheaper than full comprehensive anyway.

Lyndon Poskit does it on his 690s for travelling around the world.he converted few bikes to Carbie
he also recently put a big bore kit on it in Adelaide, not sure if its similar one

http://www.frauenschuh-tuning.at/index.php?id=ktm_lc4_690

maybe easier option than turbo

Yes - thank you for the link, Java Man. I did know about the high comp piston. Interesting to know that someone has carbied the LC4-twin-spark. I presume you didn't mean he'd carbied and older single-spark LC4?

 

Thanks for the info, Java Man.

As a side note, shortening the lower gears and making the upper gears taller seems a bit wrong - that is widening the spread - as you said. If I were to redo the gearbox, I'd make all the gears tighter, that is, bring 6th closer to 1st. I say that because the comfortable power band on the LC4 is only from 3'000 to 6'000 thou. Below 3'000 is liable to give you stutters and above 6'000 is kinda over-cooking it for cruising around town. When your comfortable range is only a 3'000 wide band, I'd want a gear box tighter than a duck's bum.

 

they make close ratio gear box too i guess more usefull for racing.
and the wide ratio gear box is good for adventure riding, low gear in the had stuff and tall gear on highway

 

I didn't see a close ratio box on their site, not that it makes any practical difference to me @ £2'200 + freight + fitting, my Duke won't ever be sporting one.

 

A 690 with 120HP would deliver
Power to Weight Ratio
0.366 hp per 1 lb
Thats awesome at weight for those guys doing those crazy runs up the mountain roads .
Bolder or any other members ,do you know of links to the build up specs of a 650 race model with that kind of HP.

 

Bolder or any other members ,do you know of links to the build up specs of a 650 race model with that kind of HP.

It's BoldOr, Cers, but I'll get over it.

I can put you in touch with the Fella who made the 115hp claim, he's on one of the 690 sites on Facey.

But before you "blow your load" on the concept, remember that I doubt anyone has put a carbie on the 4th Gen Duke LC4 690 with its twin sparks. All these outlandish (but possibly very true) figures claimed are based on the Gen III single spark 690 from what I know.

 

Chopper works ab om Facebook.

Does this

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To me it looks like twinspark head, but the oil line from the filter cover is missing like the pre twinspark.

 

Chopper works ab om Facebook.

Does this


To me it looks like twinspark head, but the oil line from the filter cover is missing like the pre twinspark.

The Holy Grail.

I am not sure what "ab om" means, but I like the sound of Chopper.

[We have a Chopper in Australia too. He has social issues]

 

it looks like there 2 sparks on that engine, unless the second thing is some sort of sencor

original article
http://www.brake-magazine.com/spotlight-ultimate-ktm-690-travel-weapon/

he now gets 80hp from his 730cc engine

scroll to and click the Lyndon Poskitt's Full Bike Specification Sheet for details list of mods he has done to his bike