Use the search tool: KLTMX

 

just cause i only have 1 post doesn't mean i'm a noob....

i've been on here lerking since 2006.. did lots of searching and reading since then!!!



found some on the fork setup, nothing on rear shock setup though!!



if you have nothing productive to add then don't post



edit: i'm not building a KLTMX.. its staying 2stroke all KTM.. just looking for the suspension guru's to chime in. thanks

 

Wow, you're very defensive. Its aparent that you've been "lerking" around since 2006 but hey I thought my post was productive. How was I suppose to know you havent seen that thread yet?

 

sorry man, just trying to keep it productive....

and now hopefully we won't get another "use the search tool" post

 

What's up bro! You go with that stroker of yours. I don't know a ton about the rear shock on that bike, but I can assure you that .46 springs will be way too stiff for you, and your nephew.



Before you spend any cash doing something that will be wrong in the long run, I'd call PR2 racing and tell Chris what you're trying to do. They know a ton about suspension, and can revalve and respring the KTM suspension for you. If not PR2, then I'd call Feal Suspension.



I made the mistake of running the .43 springs in my KX65 up front, and they were way too stiff for the 6.1 sprung Fox shock I have out back. PR2 told me that those springs would be for a 210 lb. rider. They suggested .36 for my 150 lb. weight. I'd go with .38 springs in your KTM. See what a tuner says. You'll want to get the suspention revalve for your weight, or the rebound will be wrong,



Keep us posted on what's going on with that build. Where are you located anyway? --L*64

 

thanks for the input L*64.. thats what i was looking for...



i want to do the suspension myself, i won't be racing this bike so i don't need it to be as spot on as my 450's..



so, no i gotta try to find fork springs around .38kg



and for the back, that fox podium spring.. is yours klxmx to stiff in the rear with that spring?



i've rebuilt forks and shocks for many years now as i am a service tech at a dealership, but i've never played with my valving. and i'd rather not, so the real question i guess is would the slight uping of the oil weights be enough to offset the heavier springs??

 

As far as the KLX that I race with--- the front MBS springs .43 work pretty well in the KX65 forks that I'm running because the bike is about 30 lbs. heavier than the KX, and the rear shock I'm running is stiffer than the Fox Podium that PR2 set up for me. In summary, the front and rear match. The whole suspension feels generally stiffer than the suspension on the KX. I may have it set up stiffer than what it needs to be, but equally stiff.



When I tried the same fork setup on the KX65 with the PR2 set up Fox shock, they didn't match. I guess the Podium was correct for my weight, and the fork springs were way too stiff. They also had 10mm too much oil in them. When I rode the bike... it was a nightmare! It looped out hard core when I jumped an easy little dub! I'll try it again with the correct fork springs (PR2 recommended .36 to match the rear, and I weigh 150).



I'd go on the Race Tech site and see what they recommend for your weight and the KTM65. I do know a guy on here who has a KTM65, that has told me that he wishes that he hadn't had the shock revalved for his weight, and he would have just resprung it. You may PM him. It's Williegbiker.



As far as shock oil go-- I'm clueless. All I can say is that you need matching springs front and rear for your weight, or it will be a nightmare. If you don't change the valving, I imagine that the issue will be had in the rebound of the suspension.



I think Cannon Racecraft has .38 springs for your ride, they may even have a shock spring too. Good luck, and be careful what you do when you're testing-- that's how I got trashed! --L*64

 

racetech spring calculator for 140lbs. is .320kg front and 5.72kg rear... and for 150lbs is .329kg front and 5.88kg rear..



now i just gotta think about what i want to set it up for.. I'm 175lbs. and my nephew is around 100lbs. so 140 or 150???



that connon racecrafts got what i would need for front and rear, thanks for the info on that company... i was worried about springs even being available..



i'm going to do springs only, use the standard oil weights and go from there...



the rear shock has comp/rebound adjustments, so i can dial it in for whoever is riding it at the time... BUT the front forks have no adjustments, so i'll cross my fingers on the rebound being ok and i'll add/subtract oil level for compression.



also i can always try heavier oils if needed. does this sound like a good direction to go?

 

Race Tech's site says that I'd need .34 front springs for my weight, and a 6.80 rear. PR2 set my shock up with a 6.1 spring, and recommended a .36 front. They were in agreeance with the rear, but a little different up front. I may try the .34 springs if the .36 are too stiff.



PM Williegbiker-- he knows all about what you are trying to do, and I think he weighs the same as you too. --L*64

 

well, i broke into the forks today and found there is the stock .320kg springs in it.. so i'm thinking of trying different oil weight and heights to see if i can find a sweet spot...



and the rear is the stock 4.0kg.. so rear spring is needed.. i'm guessing to match the slightly stiffer front setup that a 4.6-5.0 range should work.



also got a line on some new marzocchi shiver minicross forks.. if they are a good price i'll upgrade to them and rework them slightly..



thanks for the help luckystar

 

170 lbs you need 50 spring.

 

thats what i was going to order from you.. but on the advice of 2 well known MX suspension companies and also the race tech custom spring calculator.. the .50kg springs would be overkill.. the ktm 65 is lighter than a klx setup, so that might play into it also..



i want to set it up for around a 140lb. rider, that way my nephew can ride it and it won't be super stiff for him...



at 140lbs. the race tech recommends .320kg fronts and 5.7kg rear spring

the MX suspension places also recommended close to the same