KymcoForum.com
Offroad => MXU => Topic started by: MXU500_Red on January 15, 2008, 08:25:17 PM
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I know 500racer2 suggested to (to 400racer) to go to the EPI white spring. I thought he was just kidding ( I thought it was too stiff) but it sounds like 400racer is happy with it and maybe it would work good for me.
I have a white spring on order.
Question - Does anyone know what the stock spring spec. is? Is it more like the EPI blue spring?
<from EPI site>
Fits: 500 MXU
Color Part# 3" Load 1 3/4" Load
White KDS15 215 lbs 350 lbs
Orange KDS16 190 lbs 320 lbs
Blue KDS17 160 lbs 280 lbs
Be nice to know what stock is in comparison to what EPI has.
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I would say it's probley even alittle softer than the blue
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Thats kind of what I would have thought..
I remember when I took the stock spring out of my MXU300....I could pinch it closed (compredd it) with my fingers in one hand. The EPI spring I could barely compress it a 1/4 with both hands....much stiffer.
I imagine the white spring for the 500 would be the same.
I also ordered a Orange spring to...in case the white spring is too much.
I'll report back in week on the results.
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4ooracer..
You have had the 'white" spring in for a while now. have you been riding race like courses latey and if so, is the white spring still a good choice?
Mine came in and I have the orange and I have the white spring....just debating which one to put in first and try.
500racer2....which spring did you go back to?
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I love the spring, acceleration is excellent. I am not sure what racer2 has in now.
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I am running the stock spring at the moment, ran it all year with no problems. White spring was just to stiff for me and haven't tried the orange, need something to be in between the stock and white would work the best.
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Thanks 500racer2.....
That is what I am thinking too.....the white spring is awefully stiff.
I think the orange is that spring you are referring to....it is stiffer than stock, but not as stiff as the white.
400racer likes the white it though....interesting.....I am thinking I will throw in the orange on first.
Hows the Rocky training going? How many raw eggs you eating a day now? :D
Seriously though....how is your two 500' s coming together...I know you changed over to a new frame on one right?
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Well...I put the Orange spring in today. My first impressions is that I am going to be satisfied with it overall.
I haven't rode enough yet to really know. It was not a drastic change. The white spring I would probably really noticed on my trails at home, but I am afraid it would have been too stiff on the open long loops and trails at some of the parks I ride...the orange has a little more gear down ( I can tell the secondary is cloing up a little faster) but not drastic.
I think the orange is the right comprimise but I am not firm on it yet...I still have the white spring I can put in after I get more riding time with the orange.
The orange spring at first, did not seem much stiffer than stock. When I took the stock out, I compared it to the new springs. The white was obviously stiffer than stock, but the orange was only stiffer when you compressed it down a bit. I decided to put in the orange since I was running out of time...I'll go with it for awhile and report back with more data.
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Any carb updates? ??? Run that orange a few rides and then change to the white and go from there.
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Did not get to do any carb adjusts this weekend like I hoped. We are conviced though that the needle jet needs adjusted (move the clip). It definitly is running rich. The Main is still up in the air . The guy who ordered it was out of town a dwe couldn't find it anywhere.
We are first going to move the clip on the nedle and see how it runs on the low end after we lean it a bit.....then we will put the 148 main and see how she does overall.
Yeah.....I still want to try the white spring...just need to get a spring compressor when I tackle it...(Used 20 tie wraps to keep the orange spring compressed long enough to get the nut back on... ;D)
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Let me know what you think of that orange spring, may switch to it and try it out, training coming together as much as my quads are. One done, one in pieces, waiting for pieces.
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at least you have 1 done i dont even have 1 yet!
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Can't help you are a slacker !!!!!!!!!!!!!!!!!!!
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Can't help you are a slacker !!!!!!!!!!!!!!!!!!!
I dunno about that...
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I got to ride good bit this weekend (finally). The Orange spring is really a great improvement over stock. It is not a night or day switch but if this really is a great setup now..
I got a tell you, my 500 seems to get faster and quicker everytime I ride it . It was really responsive on the trails and really poured on in the open. The thing seemed to really be making horsepower today. I let my son ride the 500 around a little in the parking lot and he would just start rolling and he would punch the throttle just a little it and he would spin the tires and sling the back end a round. It really looked powerful when he was doing that. Those 26" XTR's are no problem to turn!
Man , that AC pipe sounded like a race car too...eeks..I didn't know it sounded that loud from behind. Sounded bad a%% for sure though ;D
I still want to try the White spring though just so I will know how it does...not sure when I'll get to it though.
Ken...you said the white spring was too stiff for you....what is the effect on the track? Loses top end?
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my opinion is that the white spring is still not stiff enough. I wanted to put a shim in there but there wasnt enough room. i am still not getting the stall i want out of the hole.
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We talk alot about the secondary spring and roller weights....how about the wet clutch assembly itself. Seems like that is a good place to alter stall speed too.
Have any of you guys looked in that area? Could we lighted the clutch weights there (or would you make them heavier...I get confused on that one?)
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The only thing that is going to help with your stall is put in lighter weights and put in stiffer springs in the centrifical part of the clutch same as the yammi's , some Cats, suzuki. The secondary has nothing to do with the stall that section controls the shift pattern of the transmission.
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Yeah.....thats the part I am talking about. The main clutch, which is behind the primary (behind the drive pully and rollers) . Looks like there are 9 bolts that hold on the clutch housing and the centrifical clutch is behind it.
The service manual does not go into any detail about the springs and weights (although it shows them in an exploded view) only inspects the clutch shoes for wear.
Be nice to get inside there and play around with the weights and springs. I don't have the expertise to dive into that area (ok I am chicken)....maybe one of you guys will ;)
I wonder if EPI has weights and springs for the main clutch ( I have only seen roller weights and torque springs).
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played with that alot with out getting the results i was looking for. all that does is raise the stall. i am looking for a consistant pull from bottom to top. i am almost there. Robey keep cutting those clutches its not going to work!!! we do not have the power as a prairie to handle the degree changes when cutting them. also our machine suffers from lag that is why i am playing with the secondary spring to make it more consistant. you can ask epi/dalton or any clutch person it is serious testing time. and it all changes when you change tires. 23 inch - 25 - 26 inch . also factor in tire weight for rotating mass. i am running fronts all the way around this year. if you think about it you really dont need the wieght and with of the rear tire.
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Your right on one thing it will raise the stall but will slow the upshift which will allow more pull down low and threw the mid range + it will backshift quicker for you in the woods and better throttle response.
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Hey Greg, I just found the site! Are you ready to start racing your beast with us in the sorcs series?
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Jon....Hey glad to see you on here.
I am trying to get a set of the a-arms and front shocks that the guys racing are using...then maybe I'll think about racing the beast. Of course I would strip to racks and remove the winch for racing ....that would help a ton.
Do they (sorcs) race at Aonia Pass and BroadRiver? I want to at least get my son into one of them.
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You coming to steele creek greg?
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Hey Jordan....I won't be making it to Steele Creek (Although I would love to be there). That weekend is my birthday (I'll be turning 26...ok.....36.....huh...ok....keep going...... ;)) and I have some other plans.
Do you think it will be as muddy and tough as it was here at Washington, GA.?
That place was like how it is where I ride at BroadRiver (wet/muddy/treacherous trails, etc)....I can imagine how it was out there in the race...
JR Motorsports (who posted up above) is the dealer I bought my Kymco's from....he (Jon) has been after me to come out and race my 500. I am thinking about it.....
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Its fun, just lose them big tires. Steele creek should be fun, its my "home" track per say...
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Don't you usually get to do what YOU want on YOUR birthday???? See you at Steele Creek.
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Don't you usually get to do what YOU want on YOUR birthday???? See you at Steele Creek.
Dang Ken....don't put me on the spot. :-[
Yeah your right....I'll be there.
It's funny....I think my birthday is when I have least say so in what I do...crazy huh ???
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So you are coming? Now just bring the 500 and race...
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Won't be there until Sat. Morning. Can't get off work Friday. See you guys on the starting line.
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Sorry guys....Actually there is too much going on at home this weekend...won't be there.
Now don't slack off on me though (ha ha)
400racer....I went out and me and my son have a race course set up on my property. It starts out in the field and ends up in the woods (modeled after the courses you guys race).
The trails were originally cut for his MXU150. I have widened them here and there. But I was racing against him on our 300. I could keep him at bay on it because it is fast and nimble.
Then I fired up the 500 and went out and tried to race the same way....NOT....the 500 beast I have is definitley not a racer..way too heavy with those big tires. I won't be racing with all that stuff (winch,big tires, racks).
I really need to have two - one racer and one 4WD mud machine.
Oh well.....I can appreciate why you guys try to get the weight down and use smaller tires more... :)
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Guys...I took my Orange spring out and installed the White (well...Mr. KymcoManager did it for me...I helped).
I think I like the White spring. Now I have really only tested it out on my tight trails at home (which is where you would expect the white spring to excel) and I like how it performs. Now it was not a drastic change feel to me.....but maybe if you were going from stock to white it might be.
I definitley feel like it is allowing the quad to operate in the rpm range where it is the most powerful...it backshifts better when you need it and you feel a little more positive response when coming out of as tight turn and getting back into the throttle.
As 500racer2 said once.....it doesn't fix the low end bog issue....so don't expect that.
I am pleased with it so far.....I need to do some more riding to really tell though....