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About mr.skywalker

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  1. mr.skywalker

    2006 KTM 250 XC-W Top Speed Question

    Well the xcw does have lower first couple gears but it also has taller top gears(the w means wide ratio). Also it should be a 6 speed I think(its older model so I am not familiar but my 200 xcw will definitely do 70and has a 6 speed
  2. mr.skywalker

    ? for those with fan kits.

    I guess to clarify what you should go by is what the max temp is that you reach while running, not just the temp the fan cuts on. if the fan cutting on at 180 makes it stabilize at 200 then leave it there, but if it cuts on at 210 and drops it, to say 190, I would leave it higher so you dont always pull power from your electrical system
  3. mr.skywalker

    ? for those with fan kits.

    Factory streetbike are set to come on about 210 and shut off around 180-190. Ideal operating temp is between 185-200, anything lower and its not really warmed up. We had a local guy here struggling on his 350 bc it is estart only and his fan was set at 180 so it was basically always on and he couldnt get his bike started due the fan draining the battery. Engine damage doesnt really occur until above 240(this is in 4 strokes anyway). His final solution was to leave it at 180 but has a manual cutoff so he can charge it the last few minutes before shutting down while he is still moving. If you question my logic I was on a formula student race team as powertrain lead (and a mechanical engineer with focus in automotive/internal combustion engines) and we had all sorts of cooling issues but we were just trying to keep our engine from exceeding 250. we were running a gsxr600 with never exceeding 60mph and revving the piss out of it and using a 4 wheeler radiator so you can imagine why we struggled lol car was fast though
  4. mr.skywalker

    Lowering Kit For XCW

    I havent done the hole drilling for lowering but I did do it on my grom to soften the foam, it really makes a difference and could help if you wanted to keep more foam but just needed it softer so it sags. On my berg, there wasnt really much foam left, maybe 1/2" at the thickest spot bc the midline of the seat was the highest point and any thinner you would really feel the base, it was stiff as it was
  5. mr.skywalker

    Lowering Kit For XCW

    I'm about the same inseam as you and would one day like to get an xtrainer but not just because of the height. Anyway I had 2010 husaberg 450 and if you didnt know its the same suspension as KTM but I swear the seat height felt a good 1/2-1" taller than most KTM of that time and the weight was really high so when it leaned over it was really hard to hold up. What I did at the time was I did the x bushing and shaved the seat about 1"-1.25" and slid the forks up 15mm. this gave me about 2" lower height from stock and didnt hurt the handling too badly(the xbushing does ever so slightly affect spring damping/spring due to leverage differences). The most annoying thing for me about that was the seat being low made the bars feel tall while the pegs were closer. so I ran a set of lower bars to help with the seat to bar relationship. Another issue with a lower seat is they spread your legs out more as the base is usually wider making it seem not as low as you would think. Since then I sold that and just picked up a 15 200xcw and i bought a second seat to try different setups and stil being able to go back to stock. I think the lighter bike will make enough difference that the height will be more manageable but if I think it is still too tall I may go with the x bushing again as it doesnt cost too much price wise or ground clearance(compared to the 2" kit)
  6. mr.skywalker

    The KTM 200 Club

    Well I just joined the 200 club a last weekend. Picked up a 2015 for descent price bc it needed new cases(front engine mount cracked and rear swingarm mount ovalled out a bit. Turned out to need a bit more work than I thought but all said and done I will still be paying right around the same as what they go for around here and once I am done it will basically be a brand new engine(new crank and top end) and have be setup for me. I was looking to get the new Beta 200rr as everyone around here keeps telling me to get a 200 and I agree its probably the best size for me( I was previously on a 2011 yz125 with EG 144 kit). The beta had an appeal to me bc of the lower seat height (5'8 and 29" inseam) but after checking the specs its basically the same as a lowered ktm(1.5 lower seat and 1.5 lower ground clearance) so why not save a few bucks(or $4500 lol) and get a well known and loved bike. I do ride a dr200 and I keep up with most of the other riders in our area and I think that annoys them I can keep up with an old beater haha(I have a build thread on that bike in the dr forum and it has been an awesome little bike but lacks power and ground clearance) I think they meant a different 200 though 😆 I look forward to riding this thing, possibly this weekend if the crank and piston come in tomorrow 😁 Busted engine mounts Ovalled pivot Engine torn apart Giving her a good cleaning
  7. mr.skywalker

    Keep it Cool. Mx action Moto physics

    I cannot say from any studies I have seen or done about if increased coolant flow increases cooling, but the concept I see is this: The larger the mass of coolant flowing through the system(assuming the same operating conditions of course) the more mass there is to absorb the heat and from only looking at that it would work better. The hard part to justify in my mind is that the less time the coolant spends in the cylinder, the less time it has to pull heat so the delta temp entering in the radiator to the ambient air will be lower, thus reducing its efficiency as well as the higher flow also reducing the time it spends expelling heat into the air. I believe this is the argument for slower flow rates being better. The only sure way to increase cooling capacity by increasing flow rate is to increase the coolant jacket size so the coolant slows more to have more time to pull head and also increase size of radiators to once again increase time to expel heat. This is why in the article they mentioned the massive coolant system works but you compromise bc of weight. Now I do know a bit about radiator design and as a rule of thumb is if you are generating the same power in both scenarios you need completely different radiator designs but both need to carry the same cooling capaity: 1. for slow technical riding you want a wide(large frontal surface area) with a thin core. this allows the slow moving air to pull heat in the low amount of time it has passing through the core. This is the opposite of what you want though bc usually in tight terain you want smaller rads to keep from catching on stuff and bending them 2. for high speed you want a smaller(less frontal surface area) but much thicker core. this gives the extra time needed as air is forced through the core. So that said I never see any marketing say this radiator works better for low speed and this one is better for high speed but if they give you the info you need you can determine which would work better. Hope this helps you if you are looking to make improvements
  8. mr.skywalker

    Keep it Cool. Mx action Moto physics

    Two things I know that are wrong were: 1. "Higher velocity means higher pressure", this is not true, a higher pressure differential generates higher flow rate but the static pressure actually drops as velocity increases. 2. From a scientific standpoint fluid is either turbulant or laminar in flow, basically once it become turbulant increasing the speed does not make it "more turbulant" it just flows faster Maybe those are the two errors the previous guy posted about? FYI also a mechanical engineer (with a focus vehicle dynamics and internal combustion engines) lol
  9. mr.skywalker

    Beta 125rr?

    I think the reason for the kickstart only on the 125 are two reasons: 1. Cost: it drives down the cost, the 200 is essentially the same but has estart and OI but comes at a $400 higher price tag. My guess is that the estart kit once released will be more than this seeing as the kickstart kit is $400 2. The targeted use of the bike is like most 125s, young kids or as a playbike. Weight is more of a concern as it is not typically an older person who is using it as a primary bike so kicking when you are young and have energy or are out playing/training is not an issue but the weight saved is a plus. Although with a 125 Idk if you can call it "kick" start more of a foot drop start haha my yz I could just about start by hand and that was a high compression(race gas only) 144cc
  10. mr.skywalker

    Beta 125rr?

    gmurr you and I are similar height wise, and I think the 125/200(or any of the betas) are much better than any of the other brands height wise. If you havent sat on a Beta I recommend you see if there is a dealer or a friend who has one, I sat on a 300rr and the xtrainer when I was in Michigan few months back and the 300rr was a hair too tall, granted for whatever reason it had so much preload it only sagged about an inch with me on it but the xtrainer felt perfect and it didnt sag quite enough either. My next biggest issue is weight hence why I am looking more for a 125/200 sized bike. Now coming from a 4 stroke and it sounds like you havent ridden a small bore 2 stroke the 125 takes alot of work to keep it on the pipe and it will never have the torque you are used to on a 150f. Its not forgiving which is good if you learn to ride it but its more of a training tool/fun bike than an only bike IMO Weight is an issue I will struggle with. To put it in perspective for a 160lb rider on a 250lb bike(most 250s) to have the same bike weight to rider weight ratio Id have to be on a 190lb bike which does not exist without going to a 150r or kx100 which sucks because no improvements are being made in that size for woods.
  11. mr.skywalker

    If you could buy one Beta right now what would it be??

    I've been saving for a beta and until the announcement of the 200rr I was going to pick up a used Xtrainer but 200rr sounds perfect. I race enduros and ride almost regularly on single track with some hard enduro training stuff setup. The Xtrainer would be perfect if I only did local trails(currently using a dr200 and it handles everything but hard enduro stuff bc of ground clearance) but it puts me in a a class I dont really want to run. That being said the 200rr is perfect I think. I am a smaller guy 5'8 120lbs so the xtrainer has a real appealing seat height but the 200rr isnt as tall as the ktm/yamahas I have been riding so it should be just about perfect. I also like the idea of estart and OI. Problem is the nearest dealer is 300miles away 😧 Beta should make a 200 xtrainer lol
  12. mr.skywalker

    Beta 125rr?

    In stock form yes, the suspension is going to be very different(why I had to do so much suspension work on my YZ to make it a good woods bike). The beta will have a better gearing as well but engine wise it really wont be much different. Look at ktm150 sx vs the xc, only differences are suspension and trans so its not as different as you might think. Also yes the yz has not been updated in a long time but the technology isnt really that far behind
  13. mr.skywalker

    Beta 125rr?

    I agree if you arent sure the 125rr is the right bike the 05+ yz125s are great bikes and can be had for decent price(sold mine for what I payed). I had an 2011 with a EG 144 kit with the lower end porting and engine wise left nothing to be desired for a 125/250f class bike, could climb any hill in 2nd. My issues with it were gearing, suspension, and seat height. Gearing was a little annoying because of the close ratio trans so it could gear for tight or wide open(some races required both which was my real issue) but I generally kept it close to stock. Suspension took some work for it get along with me well(120lb novice) but spring rates where biggest issue but I had that 95% sorted before I sold it. Seat height was breaking point for me which is why I sold mine after 2 years (30" inseam and tight technical was a pain). I currently ride a 97 dr200 but I am looking to order a 200rr. I was looking at xtrainer but I do race so suspension is an issue. I wanted something light, shorter seat height than ktm/yamaha, and able to ride technical hard enduro and singletrack so the 200rr fits the bill for me. I think it would be best to find a cheap mx 125 and see if you like it. I think with mostly trail riding it will be hard to beat that 150f though, I could ride one of those all day in the woods but if you do any significant track riding a 125 is hard to beat
  14. mr.skywalker

    Adjuster screw on bottom of carb issue

    Ive run a a drz400E petcock on mine for about 2 years now and plugged the vacuum port. No issues as long as you turn it off after you ride
  15. mr.skywalker

    BoanoAndreani X-Trainer Fork cartridge Kit

    I dont have any experience with this kit or Beta's but do know a good bit for tuning forks. First off it sounds like you need to learn some tuning basics before you go any farther. You said you backed out the compression and rebound all the way. You might be ok backing out the compression but rebound you never want to do more than 1 or 2 clicks at a time. As mention if thing are to soft you may ride harsh as you will be getting farther into to the stiffer part of the stroke which too soft of a rebound and compression valving would allow. I commend you go back to the factory settings and get a good basic understanding of what each adjustment does. Also as mentioned check fork to axle alignment as that can cause binding