125-200cc 165 owners, what sprocket sizes are you using?

I am sure I can gear taller, just not sure how much...

It really depends on what you are riding. If it is all crawly, technical then go with 13x51 or 52. If it is a typical enduro mix then it will pull 13x50 quite handily. Hopefully some of the guys that have them in England will chime in on there experience.

I think it does well with the stock gearing. I was running 13x48, turned out to be overkill for tech/enduro. Ended up with 12x48.

On my 165 I ran 13 -52 from wide open desert to tight single track. It is only going to rev so far and you can not blow one up
When I race king of the moto and Last dog Standing I ran 12-52 Top speed about 35mph but what fun

I sold my National # 1 Plate Holder Husky CR 165 to Mr Walt himself. So walt what are you geared now?

I do miss that little do all bike It was a winner

Your 165 is still running 12x52. Jase is really enjoying the mountain goat qualities of the bike. He is really happy. I expect him to probably gear it up a tooth on the CS sprocket with time. Bike still runs and handles great.

In a typical UK enduro / HH event I ran 13/ 51 - 52 but on faster events went to 14/51-52. Even in the tightest going my 165 pulls that with ease even with my over weight wobbly frame on board .
Trig runs 13 / 52 on his 125 and that thing has never struggled in pulling his light weight frame around.
Tried a 12t on the front once and it made the bike usless down fast straights and never even had the need to use first gear ever.
Must say if its really tight going I do change the pipe for a more low end item as in the stock later KTM 200 pipe but that kills the top end off pretty bad,
Still love how different pipes make Walts 165 so flexable, Just a shame I still cant ride mine due to a ongoing back problem

13:50/52(12:48)

So the extreme one here is 14 51.....this never bogged on slimey straights or struggled on climbs?

Matterly Basin (mxgp track) is about the fastest ride I do, The woods in the valleys are steep rooted and rutty that have riders falling off everywhere - Only once have I had to go back for a second shot at one hill and that was due to a stuck rider in the way. Also has the longest straight of the seasons rides back through a stubble field, In dry conditions the 165 pulls around 68mph geared 14 /52 - In the wet as per the last time I rode there it pulled 56 mph geared 13/51 but did stuggle unless revved to death in 5th to pull 6th but the conditions were vile that day but the 165 even with my old fat ass on board managed to pull a few 250fs along it.
Near to where I live there is a climb know as rocky ruin that is as the name suggests a boulder strewn monster, The 165 has climbed this many many times geared 14 /51 but you have to hit it well hard at the bottom and down shift as it gets worse towards the top but it almost always makes it while others have to find a way around it or be pulled to the top on 450fs. I weigh arond 235Lbs ready to ride and if it will pull my fat ass around geared as above a lighter pilot should have no problem with it.
Walt sent me a early model wider ratio gearbox that I now use and my gearing for that is either 13/48 or 14/48 and again never fails to climb anything thrown in its way. I much prefer the wider ratio box as it gives a bit more scope right down low or way up top but best of luck finding one of those boxes here in the UK as I have been trying for years.
Buy a 14t and try it as its not a lot of money as a experiment to try and find what will work best for you and the conditions / tracks you ride on.

Well I counted my teeth for the first time and I am running 13 51. No surprise I am looking for something a bit taller for the fast sections or the road sections between trails. I'm going to try 13 50

What one tooth on the rear You wont even notice it lol

I typically run 13-50. If I know the terrain is going to be slow and gnarly I'll swap to 12-50 or 52

I fear change......

Hi, I live in the uk and are getting my HUSQVARNA Wr 125 sent off for a 165 kit but was told it will only run on race fuel is this correct ?
Thanks

Not true - Mine runs fine on esso 97, I did have to settle on the thickest base gasket as I still had a tiny knock in deep mud situations but the bike at these times would of been very very hot (good old English riding conditions)
If useing the stock carb You will find you will have to drop the pilot size and go up on the main and the best thing for that carb is to make it a paper weight ! PWK works far better, Is easier to jet but if your feeling a bit flush get a Lectron with a MS3 rod and you will be far happier although I still modify the MS3 for a richer top end and a real short power jet tube so it only comes into play when flat out so the carb relies on the rod far more than the power jet , Not really a must but makes for truly faultless carburation.

Thanks johnnyboy I will now have to find the best guy to carry the conversion out I was going to send it to maxpower as there is nobody in the uk doing I don't think is it?
They were the ones telling me about the race fuel so I backed out but I would really like it done

I ran mine on whatever last week at an enduro in Yorkshire. Runs sweet on all grades of high street fuel. Who told you that it only runs on race fuel? Bike is not really highly tuned, just a bigger bore.

One of the reasons I got the Lectron was because I could not get my race tuned bike to rev through properly on any jet size before the 165 was installed. It was heavily ported, polished etc.

Hi richgilb, maxpower told me that they only can run race fuel because of the design of the head? Who done your conversion then
Thanks

As johnnyboy said

The kit runs OK with normal 97 gas

if fuel is really crappy (in Asia it is) you look at a modification of the cylinder head but so far I know that is only done for Asia and Australia bikes

the lectron is a no brainer in all aspects.

it saves you time (no tuning anymore ones it's set good)
it saves you fuel (its more economical)
it reduces the spooch out of your exhaust
it gains a bit more power
it makes the power delivery smooth

Its in my book the first engine upgrade on a motor with a conventional carb.

Robert-Jan

Ok thanks for info rob