New DHZ

[Juls]

Oh yeh kids can ride them no probs,
just they would be bouncing along cause the suspension wouldn't even sag under less than 60kg.

Juls

 

[binking]

No offence but the bike looks pretty average to me.

 

[hyprvs]

Howcome mine is different?

Hi guys...I have just bought a bike from DHZ off eBay...I got it for $799 and $80 postage. Here is the link...

eBay Australia: 2007 OUTLAW 140CC LIFAN OIL COOL PITBIKE, GPX THUMPSTAR (item 230139307559, end time 08-Jun-07 19:45:00 AEST)

Anyway what I just wanted to ask is...how many differences are there with the bike I have just bought...and the ones pictured in this thread?...they have a fair few things different...could you guys please tell me the differenes...so far ive noticed the front and rear suspension and the oil cooler is different...are these the only differences...? like is my bike still identical apart from these things and could I jsut bolt them on? is my bike still good? Any help is much appreciated...

Cheers, Joe

 

[Flarry]

The photo on eBay is old, they will send you the new one pictured in this thread.

 

[Cactus Jack]

Hi guys...I have just bought a bike from DHZ off eBay...I got it for $799 and $80 postage. Here is the link...

eBay Australia: 2007 OUTLAW 140CC LIFAN OIL COOL PITBIKE, GPX THUMPSTAR (item 230139307559, end time 08-Jun-07 19:45:00 AEST)

Anyway what I just wanted to ask is...how many differences are there with the bike I have just bought...and the ones pictured in this thread?...

Cheers, Joe

The front forks have better internals , frame is different - it's a twin bridge railed frame with a 110 mm higher seat height and engine cradle , far superior rear shock and oil cooler and different discs .

A taller bike that's short will tend to want to wheelstand more under hard acceleration and won't corner as well as a lower bike - that's why road bikes are a lot lower than dirt bikes and drag bikes are really low and long for better control under max acceleration .

Of course a taller bike handles bumps and jumps better !

 

[Cactus Jack]

Got my DHZ monster 140 today.

the front is a little high, you have to get the legs set in the crowns in just the right position or it does feel front tall, but if you get it right, then it's perfectly balanced.

the fork as far as I can tell is a proper oil pressure fork, same as the fastace AS01RC (or any proper motocross fork) it's plenty firm, you can do a complete endo lean all my 80kg into it and still only use around 1/2 - 2/3 of the travel, my AGB29 forks bottom out if I do that!

Juls

How long are the forks on your new bike when measured from the very bottom of the legs to the top of the bar clamps (overall length) ?

We've got one of the earlier DHZ 138 bikes with the forks with adjusting knobs like Fast Ace AS-02's and they measure 735 mm .

The AS-02's measure 750 mm overall but the stepped top clamp drops the fork tubes by 20 mm so the handlebar height ends up being 5mm lower to the top clamp on the AS-O2's than on the DHZ forks but 15 mm higher off the ground .

 

[Juls]

the Axle to crown, Centre of axle at the bottom. to the top of the leg NOT INCLUDING THE ADJUSTERS is 735mm,
the Fork has 200mm of travel, and it DEFINATLY is OIL pressure design fork,
not stupid air assist sealed oil cartridge rubbish.
the stock fork has separate Compression and Rebound Adjusters as well, not just rebound as listed on ebay. The compression adjuster also has no effect on rebound, unlike most compression adjusters on cheap forks which effect both rebound and compression.

After a oil change and tune, you wouldn't choose a AS02 over the stock forks.

The stock forks have very firm springs, and have no slop in there movement, and are surprisingly stiff laterally.

From the bottom of the fork to the top of the adjusters is well over 800mm
keep in mind these have flat crowns.

Juls

 

[born2slide1980]

A taller bike that's short will tend to want to wheelstand more under hard acceleration and won't corner as well as a lower bike - that's why road bikes are a lot lower than dirt bikes and drag bikes are really low and long for better control under max acceleration .

Of course a taller bike handles bumps and jumps better !

Nice post, that is what I was trying to find out a while back.

So would I be right in assuming, that rider size and weight also plays a part in this and a taller heavier rider, might even exaggerate the problem.

Cheers Matt

 

[Juls]

A taller heavier rider will also need a taller and bigger bike aswell.
or he won't fit!

the DHZ monster is considerably bigger from seat to pegs, so it's actually very comfy to ride, the engine has also been lowered a little more than a normal pit bike to offset the extra length in the suspension and frame.

all the pictures make it look quite tall, I'll post some pics of myn with the forks dropped in the crowns till the bike is flat, the bike doesn't look so tall then.

Juls

 

[Cactus Jack]

Well , IF the stock forks are better than AS-02's - that can ONLY be a good thing for buyers and sounds fine by me !!!!!!! Maybe I should sell one set of my AS-02's and look at buying one .

Yes a heavier rider will exaggerate the wheel standing problem on a tall bike - that's why people lean forward to transfer their weight over the front end under hard acceleration .

You would have seen a tall tractor with the big rear wheels bouncing the front end up and down when it tries to accelerate or go fast down a road - that's an extreme example of what a high centre of gravity does !

For sliding etc - you want really stiff rear suspension with the rider keeping their weight down as low as possible in the turns . Just look at a speedway bike - bigger front wheel than the rear , NO rear suspension at all , minimum front suspension , and long with a super low seat height . They take off in their only gear - top - and can hit 160 kph before the 1st turn without wheel standing too much . And with drag cars and bikes - the more power and faster they accelerate - the longer they are with NO rear and hardly any front suspension .......and in some cases as in top fuel dragsters - NO suspension at all ......... just chassis flex .

New type speedway bikes with horizontal motors :

http://www.speedwaybikes.com/rw/images/05kerrbike.jpg

http://content.answers.com/main/content/wp/en/f/fd/Grasstrack.jpg

Older type with vertical motors :

http://www.historicspeedway.co.nz/Gold bikeSml2.jpg

 

[born2slide1980]

Excellent, thanks for confirming that. That is pretty much what I was thinking.

By the way love that grasstrack pic...that's the way!!!

I might just stick to my double pipe extended unit, I am still building it up and haven't had a chance, to try the extended frame yet. But I must say I would be great to have a bit more room between the seat and pegs.

Great review Juls, sound like you have got yourself a nice bike there and a big upgrade from your last one.

Do you think these forks will be a lot better the new AS02's. I have just sent my AS03's back to upgrade to O2's (hopefully for the 9" models), but after reading your posts I'm thinking these might be a better option.

 

[Franky]

pascal didnt u put up a thred saying u were looking 4 a 2 stroke 80/85
and now u changed back to a china

He changes his mind as much as his mother changes his dipers.

 

[Juls]

I don't think the forks on the bike are better than AS02's,

but the forks on the bike are good enough that AS02's wouldn't be a worthwhile upgrade.

you would want to go to at least AS01's for to make as significant upgrade.

If you had a different set of forks other than whats on this bike, I'd choose the AS02 over the ones on this bike. But if you had this bike, I wouldn't change them to AS02's

Juls

 

[Juls]

Looks like I just found where the bikes come from,

although the DHZ versions are slightly changed.

my version here : Kayo Motor Machinery Co.,Ltd
and the Pro Version : Kayo Motor Machinery Co.,Ltd

interesting, the KAYO is the brand that makes the forks on the bike.
Kayo is also the brand on the bikes at that website.

looks like half or all of the DHZ parts come from that china supplier.

 

[motoluver]

I think you've just found DHZ's dealer.

 

[pascal125]

He changes his mind as much as his mother changes his dipers.

lol, i do change mi mind a bit ay?
well im gettin a jap bike now, well very likely gonna get one cos i get one if i hav a good report and i bee tryin SOO hard the last 6 months. then i may buy miself a china bike.

 

[born2slide1980]

Ok cheers, think I missunder stood what you meant.

Have they actually started making the AS01's yet or are they still in the pipeline?

I don't think Ken will be happy that you have found his supplier... Get ready to start paying retail prices now. lol

 

[Juls]

I'm more than happy with Ken's service and help.

I don't think we can buy directly from Kayo,
and if you could you wouldn't be able to get the prices Ken does,
since he's bringing in container loads. the red tape isn't worth it.

I'm quite happy to keep shopping at DHZ for the bits..

although I wish he'd left the better brakes on the bikes.. the stock single piston ones are plenty powerful, but they don't want to stop rubbing, which is annoying.

the rest of the bike is great, it makes NO noise other than the exhaust. it's so quiet to ride.. makes my AGB29 sound like a bucket of bolts is being carried with me.
The other great thing is the lack of flex or slop anywhere, the whole bike is nice and tight and flex free.

Be interesting to see how it is after 20-30 hours use.. since i've only put about 4-5 hours on it so far.
when i've done alot of riding i'll do a proper review.

I'm still sorting out the right oil heights for the fork, looks like 2.5wt left and right is the go.

Juls

 

[born2slide1980]

Yeah I was just mucking around, just didn't come out right.

Don't get me wrong, I am also glad to keep shopping at DHZ. Ken is a great seller and a top bloke and he has helped me out on many occasions.

Cheers