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might be gettin z400, how r they?
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Posted by: eastside 400

well i might be gettin a z400 w/ a thumper 440 kit, pep shocks, ugly +2+1 arms and some other stuff, have u heard anything about the thumper kit and how they hold up and how does a regualr z400 hold up like frame and that wierd *** swingarm?

Posted by: Texasrider

Here is a link to thumper racing that you can check out for yourself.
www.thumper-racing.net
They are located in East Texas and have a good reputation for building strong yet very reliable kits for both the 400ex and z-400. Most of there work is done on dirt bikes but they have years of experience with both of these motors. Dirtwheels mag had a shootout between a 440ex and z440 that Thumper built back in an '03 article. With the other mods listed you should have a very fast bike.

Posted by: BlueZ440

I don't have a Thumper 440 kit but I have the Wiseco 440 and so far it's been great. I love riding my Z the only problem I have with mine is that I have stock suspension.

The one thing you might want to watch for on the frame is for cracks. Especially above the front shock mounts and next to the lower a-arms.

Posted by: lol

do u have to run race gas?

Posted by: Quadude32

If you want a LTZ400 id wait till early 05 it will be the LTZ450 i wouldnt waste my money on that Time~BomB But he Thats my opion and you know what they say about that

Posted by: Shawn H

Some people have had overheating problems with the thumper kit and other kits. Unless its a really good deal I would possibly search some more.

Do you know the guy selling ? If so that would help Just be careful. Check it over real good.

I had a pimped out Z450 stroker and had no problems with it just wanted to move on to the 450r.

Posted by: eastside 400

the kid i might get it from is my 2nd cousin so i kno him, anyone kno if u hav to run race gas?? if u do i might not get it, too expensive, is like 5800 a good price for it, it is a 2003

Posted by: Billdog350

I wouldn't pay $5800 for a tricked out 2003 Z400. You can buy a used one in near mint condition and do the same work to it and probably come out near that price...but know exactly who beat on it and how long it was ridden. I like having the work done by people I trust rather than a friend of a friend or whatever.

Posted by: Shawn H

You wont need race gas but if you know them so good why dont you ask him?

5800 seems high too. thing better be pimped for that much.

Posted by: thump4863

My dad has a Thumper Racing 420 kit in his z and it has held up great. They do excellent work. I'd say if the price is right then go for it. Just make sure the frame has been gusseted and you shouldn't have a problem.

Posted by: montyjcm

420 kit? How much hp does that put out?

I would ask him to lower the price a bit and find out why he is selling. Don't want to buy a quad that will break on your first ride.

Posted by: thump4863

I dont know the exact hp numbers but I do know that it was like night and day from stock. It added great low end but I do know one thing they charge an arm and a leg for engine work. the only reason we went with them is because they are only 30 min away from home.

Posted by: eastside 400

well he is sellin it to get a c-dale, i dont talk to him much at all so that is y i dont ask him, not sure if the frame is gusseted, but if it isnt ill get it done over the winter, this is the mod list, thumper 440 kit, hmf slip-on, burgard beadlocks, holeshots, ac nerfs, NEW silver maier plastics, ugly +2+1 a-arms, pep shocks, tag t-2's, teather, i think thats pretty much it, im gonna try to get him to get the price down

Posted by: ramp rida 55

ya 5800 is kinda steep i bought mine brand new for 5400

Posted by: thump4863

another thing to look at is which type of peps he has on it...the chepos or the expensive ones.

Posted by: montyjcm

Yeah, ask him what matinence he has done on it, if it has had a tune up, and look and the general quality of it. I mean, if you have the cash, and everything looks and feels right, I would go with for it.

It seems like that it is a pretty trick quad, and it will probably sell fast.

Posted by: yoshimurakfx400

i just got my kfx 400 yesterday and i love it it dosent handel as well as my old 300ex but it dose handel pretty good, and it has plenty of power

Posted by: lsittingbull

Thats odd my 400 handles way better than my 300ex