KartFab
Active member
Out of stock but you can find on eBay I think
http://www.gopowersports.com/2-live-axle-hub-4x4-out-of-stock/
http://www.gopowersports.com/2-live-axle-hub-4x4-out-of-stock/
Need advice on modifying a go kart frame + drive assembly
- Thread starter TuxRacer
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crazykart
Crazy member
Since those are atv rims the big question is: is that a 4 on 4" bolt pattern, or a normal atv bolt pattern?
If not 4 on 4" those hubs wont work.
If not 4 on 4" those hubs wont work.
TuxRacer
New member
Well the opposite holes are 4 inches apart, measuring from the inside edge of both holes. I assume that's how the measurement is taken since it was even. I'm going to be ordering from BMI for a few things anyways so would this work?
http://www.bmikarts.com/White-4-x-4-Wheel-Heavy-Duty-Hub-1-Bore_p_1662.html
http://www.bmikarts.com/White-4-x-4-Wheel-Heavy-Duty-Hub-1-Bore_p_1662.html
JMINDY
Member
At the bottom of this web page is how to measure the bolt pattern...
http://www.pureoffroad.com/atv_wheel_offset_guide.htm
Most of the ATV rims are measured in millimeters... 4/110...115... 130...144...or 156 seem to be common sizes. A 4˝x4˝ hub won't fit.
I purchased 8˝ ATV rims with 4˝x4˝ pattern and Hubs from gokartsupply.com
Tires are hard to find in 8˝ rim and 16˝ diameter, you'll probably have to go to 18˝ diameter, which will affect your gearing... I stayed at 16˝ but used a Hoosier racing tire.
EDIT: I missed your tire size... 22˝ is really large for a kart. Someone will chime in on gearing, but I'm not sure it will work well...
http://www.pureoffroad.com/atv_wheel_offset_guide.htm
Most of the ATV rims are measured in millimeters... 4/110...115... 130...144...or 156 seem to be common sizes. A 4˝x4˝ hub won't fit.
I purchased 8˝ ATV rims with 4˝x4˝ pattern and Hubs from gokartsupply.com
Tires are hard to find in 8˝ rim and 16˝ diameter, you'll probably have to go to 18˝ diameter, which will affect your gearing... I stayed at 16˝ but used a Hoosier racing tire.
EDIT: I missed your tire size... 22˝ is really large for a kart. Someone will chime in on gearing, but I'm not sure it will work well...
TuxRacer
New member
Ok, I plan on running 7:1 with a 30-series torque converter, by my math it should work but I welcome any input. I don't have a metric tape up here but by my rough conversion and the tape I do have its a 110mm pattern.
JMINDY
Member
I went through this a few months ago. You probably won't find hubs that will fit your kart in a metric pattern... most hubs in metric were 3 bolt pattern, not 4.
I found the tires I wanted to use for my racing theme kart, but they only came in 8˝... Of the 8˝ rims, I really liked the chrome Douglas rims... but could not find them in width (4-5˝ range) I wanted for the front in a 4x4 pattern (only had 7,8,9˝ width). But did find smaller widths in an ATV pattern... That lead to the problem of not finding metric bolt pattern hubs for the 5/8˝ front spindles or the 1˝ rear axle.
I ended up scrapping the Douglas rim idea and going with the steel rims that would fit the hubs in a 4x4 pattern, cause those hubs were easy to find that would fit the kart.
Only idea I can think of is maybe you can have a wheel spacer made to use between the hub and the rim, converting the bolt pattern from 4x4 to 4/110...
I really don't know about the gearing... it may work by gearing low, just seems like a large size tire from what I've read on this site...
I found the tires I wanted to use for my racing theme kart, but they only came in 8˝... Of the 8˝ rims, I really liked the chrome Douglas rims... but could not find them in width (4-5˝ range) I wanted for the front in a 4x4 pattern (only had 7,8,9˝ width). But did find smaller widths in an ATV pattern... That lead to the problem of not finding metric bolt pattern hubs for the 5/8˝ front spindles or the 1˝ rear axle.
I ended up scrapping the Douglas rim idea and going with the steel rims that would fit the hubs in a 4x4 pattern, cause those hubs were easy to find that would fit the kart.
Only idea I can think of is maybe you can have a wheel spacer made to use between the hub and the rim, converting the bolt pattern from 4x4 to 4/110...
I really don't know about the gearing... it may work by gearing low, just seems like a large size tire from what I've read on this site...
TuxRacer
New member
I'm almost positive it is a 110mm pattern based on the link you posted, this one should work as far as I can tell.
http://www.bmikarts.com/Billet-Aluminum-Wheel-Hub-for-Metric-Rim-1-or-1-14Bore_p_3144.html
http://www.bmikarts.com/Billet-Aluminum-Wheel-Hub-for-Metric-Rim-1-or-1-14Bore_p_3144.html
JMINDY
Member
Nice! Is your center opening on you rims over 3.5˝? If not you could probably trim them to fit.
Is your axle 1˝? I had a 1˝ step down to 3/4˝, though that hub may still have worked...
It was the front I had my issue trying to find.
Is your axle 1˝? I had a 1˝ step down to 3/4˝, though that hub may still have worked...
It was the front I had my issue trying to find.
TuxRacer
New member
The axle I've been looking at is 1" solid no stepdown with a keyway all the way down.
But yeah the front tires will be a pain, the other kart we have has 18.5 in the back and 14 in the front, and no noticeable lean. I'm trying to figure out what size we will need in the front to not lean forward like crazy. I don't know of any downsides to the lean other than looking awkward.
But yeah the front tires will be a pain, the other kart we have has 18.5 in the back and 14 in the front, and no noticeable lean. I'm trying to figure out what size we will need in the front to not lean forward like crazy. I don't know of any downsides to the lean other than looking awkward.
TuxRacer
New member
I never got an answer to this one so I'll ask again on the off chance the person who knows missed it. How does the acceleration and final drive ratio differ between the 20 and 30 series torque converters?
TuxRacer
New member
Thanks that's quite informative, I'm not sure how I missed those pages in my searches.
The kart has been extended, the length is now the same as our other kart and the wheelbases are nearly the exact same so they should handle very similarly.
I'm wondering what type of braking to use, drums are very straightforward but I've been wondering if I need to use 2 or if one larger drum will be sufficient.
The kart has been extended, the length is now the same as our other kart and the wheelbases are nearly the exact same so they should handle very similarly.
I'm wondering what type of braking to use, drums are very straightforward but I've been wondering if I need to use 2 or if one larger drum will be sufficient.
crazykart
Crazy member
What I personally reccomend to anyone inquiring about brakes is:
Go on ebay.
Search atv hydraulic brakes.
Pick up the whole set for around $50 usd.
They will handle better then anything else.
You could go either drum or disc with thise as well, but drum seems to be a bit harder to find.
Go on ebay.
Search atv hydraulic brakes.
Pick up the whole set for around $50 usd.
They will handle better then anything else.
You could go either drum or disc with thise as well, but drum seems to be a bit harder to find.
TuxRacer
New member
I'm already ordering a bunch of stuff off of BMI. They sell 6 inch drums and bands, $20 for each, I think that will be the easiest option to implement. But if I can get a full hydraulic set with disc braking for $50 that's definitely the best choice.
Everything I've seen on ebay looks like it will end up costing more for everything that will be necessary to make it work. I know with a hydraulic system and disc setup it will be easier to handle but the 4 inch drums on our other kart have never let me down and they are quite simple to install.
Everything I've seen on ebay looks like it will end up costing more for everything that will be necessary to make it work. I know with a hydraulic system and disc setup it will be easier to handle but the 4 inch drums on our other kart have never let me down and they are quite simple to install.
OzFab
New member
Only if the track is identical...
I'm with ck on this one, hydraulic all the way...
TuxRacer
New member
Ok I haven't been able to find one of these complete kits in that price range on ebay yet. The ones I looked at tend to be pretty short tube wise so it would need to be mounted behind the seat and connected to the pedal to operate the master right?
On the other side I've been looking for new brake bands for our other kart, the drums are a little over 5 inch OD and I haven't seen much in way of 5 inch brake bands, changing them over is not an option, I'm trying to make sure that I'm measuring the right way and that I'm not seeing the obvious solution to the problem.
On the other side I've been looking for new brake bands for our other kart, the drums are a little over 5 inch OD and I haven't seen much in way of 5 inch brake bands, changing them over is not an option, I'm trying to make sure that I'm measuring the right way and that I'm not seeing the obvious solution to the problem.
TuxRacer
New member
Well moving on to engine questions since they are with the same build, I plan on removing the governor on this engine out of the box and swapping out the exhaust for a straight pipe along with changing to a cone air filter. Everywhere I look tells me that I will need to increase the jet size to keep it running well after these modifications.
What size jet will I need? NRRacing says #95 for predators but I'm unsure how much of a difference this will be in terms of the original size, also do I need a new emulsion tube to keep the ratios in the correct range?
What size jet will I need? NRRacing says #95 for predators but I'm unsure how much of a difference this will be in terms of the original size, also do I need a new emulsion tube to keep the ratios in the correct range?
OzFab
New member
In simple terms, let the engine tell you what it needs by reading the spark plug; although they're all the same, every engine is slightly different...
Like NRRacing, we could say "use a #95" but, that may not be perfect for your engine...
As for how much difference it makes, it's only a small engine so, small changes will make a big difference, you can go from not enough to too much in two jet sizes...
Like NRRacing, we could say "use a #95" but, that may not be perfect for your engine...
As for how much difference it makes, it's only a small engine so, small changes will make a big difference, you can go from not enough to too much in two jet sizes...
TuxRacer
New member
Thats more or less what I had figured, but I haven't been able to find info on the predator's stock jet size. I've been trying to find a good jetting kit to start off with but without a ballpark of where to start its hard to find a set that will work.
crazykart
Crazy member
http://m.ebay.com/itm/Brake-Disc-Ro...0cc-Chinese-ATV-Quad-/331667069459?nav=SEARCH
As far as the tube, you can go to an auto parts store and get a section of brake tubing for around $5. If you're doing live axke younonly need one disc and caliper on the back. If yiu want front brakes as well it can be done, but will take a but of work.
As far as the tube, you can go to an auto parts store and get a section of brake tubing for around $5. If you're doing live axke younonly need one disc and caliper on the back. If yiu want front brakes as well it can be done, but will take a but of work.
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