TE/TC 125 to 150 or 200

[lankydoug]

Can a 125 be made into a 144/150 or 200 easily like the red Husky can? I really like the 125 200 lb platform but want just a bit extra low and mid-range. I have a YZ125 that handles like a dream and a RM144 that has the perfect engine. I'm thinking of selling both for another bike but I don't want a shorter bike like my 200 GasGas was. If I don't find something I'll probably sell the Suzuki and next time my YZ needs a top end I will convert it to a 144... any suggestions?

 

[troy deck]

you can 167 a YZ

 

[cmiles]

It can be done there was a new husky tc 125 made into a 200 for sale a few weeks ago on fb

 

[Norman Foley]

It's not as simple as the Cagiva Husky, which could be simply over bored ..... Factory KTM 150 is bored and stroked and even though the 200 has a similar crank, the small end of the rod is different, so you can't just slap a 200 piston on it. Eric Gorr lists a 144 big bore conversion for the KTM 125, but I don't believe it's very dependable.

 

[lankydoug]

It's not as simple as the Cagiva Husky, which could be simply over bored ..... Factory KTM 150 is bored and stroked and even though the 200 has a similar crank, the small end of the rod is different, so you can't just slap a 200 piston on it. Eric Gorr lists a 144 big bore conversion for the KTM 125, but I don't believe it's very dependable.

Ya I saw that the 200 and 150 had a longer stroke... it's pretty hard to beat a YZ125 especially when you consider the cost and aftermarket parts availability. Maybe someday KTM/Husky will come out with a 175-200 with linkage and an 18" rear wheel that is built on the 125 frame. For me, the current downside of the KTM bikes is the high asking price and the 4cs forks that add major bucks compared to the standard re-valve. I could live with a 19" rear wheel but I won't do the PDS and dislike the orange color so there's that.

 

[shawbagga]

tm en144?

 

[lankydoug]

tm en144?

http://dirt-bikes.axlegeeks.com/l/549/2011-TM-EN-144

It looks like TM uses the same platform of the 250 since it's a 210 dry in mx trim (similar to the GasGas 200). It seems to me the best 144 is the red CR Husky that they quit making.

 

[fletchman45]

http://dirt-bikes.axlegeeks.com/l/549/2011-TM-EN-144

It looks like TM uses the same platform of the 250 since it's a 210 dry in mx trim (similar to the GasGas 200). It seems to me the best 144 is the red CR Husky that they quit making.

How ironic and funny but so true. The 144 platform red husky is tough to beat besides being to tall for short guys. It is a platform that catapulted me to my best overall finishes and embarrassed many 300 two stroke and 450 four stroke riders in the process....my new KTM husky is good as well and a 250 two stroke is more forgiving but there is a hilarious feeling when you overhear two guys talking about the crazy basterd on a small bore husky...... A friend tried to buy my old 01 husky 125 the other day and strangely enough and I can't figure out why????I said no........and then my wife reminded me.....she said that looks like the bike you had when we met****************************************yea it is just it was new and not 13 years old!!! Just ask Fred hoses he will tell you the husky 125 platform is one bad bike..... And while o don't mind a KTM 150 the red 144 is better! Plain and simple......

 

[Norman Foley]

Husky 144(125/165/177) is an awesome bike, but it's part of the previous chapter now. A lot of people will still ride, race and enjoy it. I'm enjoying the new chapter... lots of pluses in my book. I lucked into the parts to build a 150 motor, so I may give that a whirl. I rode my '12 Husaberg TE250 tonight, for the first time in months. I'm still glad I bought the TE125.... but I think a TE200 with E-start would be my perfect bike, blending the best of both bikes.

 

[troy deck]

Husky 144(125/165/177) is an awesome bike, but it's part of the previous chapter now. A lot of people will still ride, race and enjoy it. I'm enjoying the new chapter... lots of pluses in my book. I lucked into the parts to build a 150 motor, so I may give that a whirl. I rode my '12 Husaberg TE250 tonight, for the first time in months. I'm still glad I bought the TE125.... but I think a TE200 with E-start would be my perfect bike, blending the best of both bikes.

hows that gona work??

 

[Norman Foley]

hows that gona work??

How's what going to work?

 

[troy deck]

your 150 B.B. deal

 

[Hoov165x]

your 150 B.B. deal

Should end up just like a KTM 150. Crank, cylinder, and related components I believe.

 

[troy deck]

will that longer stroke 150 crank fit 125 cases if you can mix that with the older 144 piston you ought to be bigger than 150

 

[Norman Foley]

A KTM guy who bought a 150XC and decided after a few hours, that he really wanted a 200. He wanted linkage, not PDS, so he bought a 200 crank assembly and complete top end, to do the conversion. I bought his slightly used parts, for less than 1/3 of retail. Interestingly... Eric Gorr, does a 155 big bore on the 150..... I'm not sure the point of that.

 

[troy deck]

that's just the way it works out there stroked 144s i'v talked to him about it a few times he doesn't recommend them seems on most jap bikes the stroking is only good for about 1.5 hp and its big money but who knows with KTM Walts 165s seem to like being 177s

 

[lankydoug]

The longer stroke will make more mid-range torque but does not up the HP very much. Going to a bigger bore like the red Husky 144 and Walt's 165 gets you bigger HP gains and is typically more dependable compared to the longer stroke engine. The longer stroke stresses the bearings and the piston much more especially when you have to use a short rod which side loads the piston. A long rod short stroke big bore is the ideal because you get more dwell time out of the piston with a long rod but not stressing it with the long stroke. Wrap your brain around that for a while

 

[rockdancer]

Ktms 150 has a longer stroke and actually more hp at 12000 rpm than the 125

Stroking a 125 vs bore only helps to keep the top end - so its not over square . A 165 is more mid range and tops out at a lot lower rpms.

Husky 144 picks up about 2 hp on the 125 and ktms 150? about 4 hp .


7000 rpm: The KTM 150SX makes 17.45 horsepower, while 125SX is at 14.90 horsepower.
8000 rpm: The 150SX two-stroke is producing 23.37 horsepower at 8000 rpm, while the 125SX is making 20.66 horsepower.
9000 rpm: At 9000 rpm the 150SX is pumping out 29.07 horsepower compared to the 25.37 of the 125SX.
10,000 rpm: The KTM 150SX makes 34.02, while the 125SX is at 30.20 horsepower.
11,000 rpm: Nearing its peak the 150SX generates 38.83 horsepower at 11 grand, while the 125SX is at 34.37 horsepower.
12,000 rpm: The 150SX is still strong at 32.97 horsepower, while the 125SX has dropped to 29.20.


http://motocrossactionmag.com/bike-...-the-2013-ktm-125sx-versus-the-2013-ktm-150sx

(Port timing is also changed with big bore )

 

[troy deck]

ok this is buggin me out so i gotta ask isnt a125 KTM 54x54.5 was there not a KTM hard parts 144 kit back in like saaay 05ish shouldnt it have a 58mm bore 58x58x58.5x.7854=154.56

 

[Norman Foley]

ok this is buggin me out so i gotta ask isnt a125 KTM 54x54.5 was there not a KTM hard parts 144 kit back in like saaay 05ish shouldnt it have a 58mm bore 58x58x58.5x.7854=154.56

This isn't on the radar at KTM Talk.... I talked with KTM engine guru Andrew Cooksey, about what would be the big bore options for a 150? He said the only option for bigger displacement shy of a complete 200 convesrsion, is to use the 200 rod on the 150 crank. You then use a 200 top end, with a modified head and appropriate base gasket. This gives you a 188cc engine, with a very linear power band, according to the guy who built it.