Update...

:-) I have no additional info as of yet... I'm stuck waiting for my local dealer to get me a Z90 CDI and some parts for my wife's KQ that got rolled last weekend.. I might have something in about 2 weeks, I Hope....

Oh and a CDI box from a 2 stroke motor won't work on a 4 stroke... ;-(

Hibrass

-------------------------
"If you don't know the dog, don't yank his chain!"

G'day mate

thanks for that, wait to here from you

hally

I bought my son a 2006 LTZ50 in Janaury of this year. It never ran properly from new. Turns out it sat for a year on the showroom floor because they are 4x the price of the units from China. Anyway $100. later the carb is cleaned out and it runs ok. Top speed stock was only 8 mph with ok but not great tourqe. I read about the washer in the cvt transmission and removed it no problem. It now tops out around 15 mph. We removed the plug in the exhaust pipe but seemed to make our tourqe problem much worse. We have many hills and sand we ride on here in south Texas and it gets frustrating to ride behind him to push him over small hills or through 3 inches of sand. I will try the airbox idea and unplug the exhaust again to see if more air helps and will let you know. My dealer herre told me there was nothing you could do to make it go faster. They also voided my warranty when they found out I removed the spacer from the transmission. "no problem there was only 2 months left" I would be happy to here if the cdi will fix this problem. sorry for the long post.

Chris

G'day chris

still waiting to see if hybrass has had any luck with the cdi from the 90. My little bloke races his ltz50 and gets left behind by the lta50. I run a 98 octane fuel in it. seems to go a bit better mate.

As I have mentioned to others on this site I have contacted several companies that make cdi unit and none have any in the pipeline being designed. So I guess we wait. I would buy my little bloke a lt90 4 stroke but he can't race this until he turns 8. He is 5 now so we have a wait.

there seems to be alot of these bikes around. My mate has two yamaha raptor 50's and he sent away to the USA for cdi units. The differece is fantastic.

anyway goodluck and I will let you know of any news.

Hally

Western Australia

I cut a large hole in the intake box over the weekend and re-assembled the airbox. I also removed the plug at the end of the spark arrestor. It has great punch for about 2 seconds before it dies. I put the choke on and screwed the throttle back to about 1/2 way and now it seems to have power to climb off its own shadow but no top end. Top end is down to 12 mph. It seems my hole may to to big on the air box. This week I will try to get more fuel in her if possible and set the idle up a bit higher. I called a local dealer about the part you spoke of. It is $200.00 and not returnable if it will not work. So I will wait with the rest of us on the other venture. Will let you know about the carb adjustments.

Chris

Jickdaddy, Hally and Co,

I'm still waiting on the CDI, it looks like it maybe here late next week. Hopefully over the 4th of July Weekend I will have some results to report. And yes you are right it is not returnable but a kindly parts man can fix that.... In the meantime if I lose 200 for something that doesn't work it is not as bad as the 2grand I have paid already.. If this doesn't work the boy will be getting a TRX90 with smaller controls...

More later,

Hibrass

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"If you don't know the dog, don't yank his chain!"

Edited: 06/11/2007 at 05:28 PM by Hibrass

I've been reading everything you guys have written about the Ltz50 so decided to join the forum... I'm excited to see if that {cdi} from the 90 will work... I called procom and got on the list for there {cdi}; if and when they have enough demand for it... I hope someone comes out with something soon because my 6yr. old rather ride with me or her mom than ride her 4wheeler... I should have bought her a big-wheel from toy-r-us it would have been way cheaper and probably just as fast...
I just bought this thing about a week ago and just found out about the spacer in the transmission... but the way some of you guys sound I'm not gonna get my hopes up..

-------------------------
Me 2007 Ltr450
Mom 2007 ltz250
daughter 2007 ltz50
myspace.com/eddiecruzproductions

G"day

stay tuned cobber, hoprfully something happens

Hally
Western Australia

Hey, folks, I'm really sorry to hear about these power problems with the LTZ50, but it should in the end be fixible somehow. Perhaps it might help to know that our Arctic Cat DVX 50 had to be modified for more speed (taking the variator restrictor ring out like some of you did, which took it from a 9 mph max to 14 mph, and then larger tires which took it up to 19 mph), but power was NOT one of the problems - it took a 270 lb. guy up a hill no problem. Also, we could have gotten an aftermarket unrestricted CDI box on eBay if it was a 90, but no such luck for the 50 (BTW it is a 2006 4-stroke, whereas all previous years' 50's were 2-stroke.) How about some clutch mods to increase low-end power?

-------------------------
James
05 Outlander 400 Max XT
90 Polaris Big Boss 250 4 X 6 with 22" Pirelli Mudwisers
06 Arctic Cat DVX 50 with 22" rear Mudlites
07 Eton Viper 90R with 22" rear Mudlites
07 Eton Vector 250 with 25" Bear Claws on the rear and and 2 5/8" spacers on each wheel

Remember when I suggested selling the 4-stroke LT-Z50 and buying a good used 2-stroke LT-A50? Now you know why....

-------------------------
2006 Polaris Sportsman 500 EFI (hers)
2004 Polaris Sportsman 700 (mine)
2002 Suzuki Quadmaster 50 (son's)

I also understand there may be a washer or spacer on the carb guide and in the exhaust port side of the head. I will check tonight or tomorow night and let you know. I guess with taking all this stuff off it is getting lighter.


ex250 mine
es420 momma
ex90 son
ltz50 sad son

Taking out that spacer made a difference, but I see what everyone is talking about. It still could use just a tad bit more power.Luckily there's some light being shed on this situation because I was ready to burn this thing..
CT RACING has a full exhaust kit. Pipe w/spark arrestor & jets, Z50 (4 STROKE) '06-'07 $349.95 that's a bit pricey, maybe there's a discount for group buys....
They also have a ct racing cdi box on the way but with no release date yet...

Here the link to the site...

webpagectracing.com/new_page_3.htm

exhaust imagectracing.com/Z50%20pipe%20&%20k&n.html

-------------------------
Me 2007 Ltr450
Mom 2007 ltz250
daughter 2007 ltz50
myspace.com/eddiecruzproductions

Edited: 06/14/2007 at 08:43 PM by edc7002

thanks weekend warrior

I will check ct racing again. Getting that pipe to western australia maybe pricey but I will have a go. Thanks mate.

Hally

ive started looking for a quad for my son and ive always liked suzuki products but the poor perfomace of the 50 had me looking at other manufacturers. if ct racing releases that cdi for this model that will make my desicion for me. all this imformation has been really helpful in making my desicion so far.

muddstudd

I think the cdi will be a while for the ltz50 should be worth waiting for

hally

Great thread, I have a 1984 LT50 and cant get it to go faster then around 5mph. Once you about 1/4 of the throttle it completely bogs down. This thing has really got me stumped, I took the carb off cleaned it out put it back on still same thing. It didnt have the cover to the air filter when I bought it so I made one with a "sippy cup lid" yea I know but it really fit perfect. I drilled some holes in it to breath and have a foam filter cut in a circle sitting perfectly inside. So its getting plenty of air and it still bogsdown like its getting too much gas every time I press the throttle more then 1/4 the way.Ive tried it with a less air configuration more air and it seems like the idle and mix screws do absolutley nothing! They do but its almost like its delayed, I use premium 2 stroke oil, 93 octane gas, I mix at 32:1 (oil mixer was removed), new spark plug, and it very rarley smokes. It has a nice clean burn too tanish color on the plug???!!! Im going nuts, I really dont have the money to put it in the shop but Im baffled at this point. You can still ride it around on flat surface but the engine never idles correctly and you have to constantly keep reving the engine to keep it going or it dies. My next step is a new piston and rings but I honestly dont think it really needs it. ARGHHHH!!!!@@@!!!!!

piston and ring, your onto it mate. Just take the head off and you will find they are probably worn out.Sounds like it has been running without oil in the fuel. Very simple to replace the piston and rings, may pay to have cylinder rebored and go oversize with piston and rings if the cylinder has bad scoring.
I used wiseco piston and rings 1st oversize ($80 Aus) and cost $60 to rebore.She had some thunder after that.

Goodluck

Hally
Western Australia

Quick update for the LTZ50 sufferers.... ;-)

I should have the CDI this weekend... Hopefully I will be able to get some more info by the end of the weekend...

More Soon,

Hibrass

-------------------------
"If you don't know the dog, don't yank his chain!"

Hi there Hally, the only reason I doubted the piston and rings was because it doesnt smoke and the plug isnt fowling?? Wouldnt it be cover in oil or is that just for 4 strokes with bad rings/piston. I know running rich on a 2 stroke will give you oil on the plug but wouldnt a bad set of rings do it too? I guess it cant hurt to swap out the piston and rings in a 24 year old atv...

Hally, you said that it isnt that hard, the one time I ever tried to change a P&R was on an old xr80 and I couldnt get that thing back together for the life of me!! Now Im thinkin that maybe a stroke will be alot easier because of the no timing chain and cam deal.

Mate its called lack of compression, rings are worn and the piston has probably grabbed the cylinder at some stage. I'm a mechanic but its simple cobber.
Remove fuel tank.
Remove carby and exhaust flange.
Remove the 4 x 10mm head nuts.
Remove head
The only prob you will have is removing the circlip from the gugeon pin at the pistin end.Make sure you put a rag over the opening inot the crankcase just incase you drop the circlip.

Any probs get back to me

Hally

I took the exhaust off my 2006 lt50 but did not find any spacers or restrictors. The carb slide oon mine is opening all the way as well. I ordered a exhaust kit with the k&n filter from ct racing. I also sent them an e-mail on a possible cdi. They have a unit in the works but looks like July for it. Our neighbors cleared there lot next to ours and this thing could not even ride over the track marks left by the bulldozer.

Chris