Protodie 450 Quad Buggy

**ProtoDie** · 01-11-2012 01:23 PM

Dave,,,,,sure bring the Pilot, lets play when it is done

Heavily debated between the Raptor 700 and the KFX450R
pricing was similar

Raptor 700 engine weight 115lbs 47HP 44ft lbs torque

KFX450R engine weight 75 lbs 36-45hp 31 ft lbs of torque

40lb difference in weight was the deciding factor to go with the KFX450

with this chassis design I am sticking with our concept of a removable engine cradle.
There should be room for the 700 or different quad motors and relatively easy for others to put their quad motors in this chassis.

Mounting motors is the easy part

Rat,,,,,putting all my coin in the build so I can not afford to adopt a well behaved 49 year old

**ihcj9** · 01-11-2012 01:42 PM

When I redesigned my race buggy last race season i put in a removable engine/drivetrain cradle. By far one of my best upgrades yet.

The entire drivetrain can come out with 6 bolts (after removing fuel lines, electrical etc.) It is so nice to be able to layout, mockup, and fabricate the drivetrain on the layout table and then bolt into the chassis when I am done. Makes welding and maintenance extremely easy.

Interested in seeing this build. I was considering the Raptor 700 for a power train but decided to go with a lighter Briggs V-twin to make more power and CVT's for the tunability.

I am a sucker for shifting though and would love to have a shifter race buggy.

Any models yet?

**Fu21cc** · 01-11-2012 02:34 PM

If you are going for lighter and its for your daughter, the yamaha warrior 350 has 6 gears and has reverse. The motor is the same as the raptor 350. They have big bore kits for it and everything. I even think its air cooled. You can probably pick one for a 1500 or cheaper.

**ProtoDie** · 01-11-2012 02:36 PM

Originally Posted by ihcj9

When I redesigned my race buggy last race season i put in a removable engine/drivetrain cradle. By far one of my best upgrades yet.

The entire drivetrain can come out with 6 bolts (after removing fuel lines, electrical etc.) It is so nice to be able to layout, mockup, and fabricate the drivetrain on the layout table and then bolt into the chassis when I am done. Makes welding and maintenance extremely easy.

Interested in seeing this build. I was considering the Raptor 700 for a power train but decided to go with a lighter Briggs V-twin to make more power and CVT's for the tunability.

I am a sucker for shifting though and would love to have a shifter race buggy.

Any models yet?

Models,,,,,blond or brunette?

cad models? yes, pics are on earlier pages of this thread

How much HP out of the Briggs V twin?
20hp stock but with upgrades what are you shooting for?

there would be room for these motors and a cvt jack shaft set up.

But you lose reverse

Now that I have had it for a few years,,,,,,,I really like reverse

**ProtoDie** · 01-11-2012 02:39 PM

Originally Posted by Fu21cc

If you are going for lighter and its for your daughter, the yamaha warrior 350 has 6 gears and has reverse. The motor is the same as the raptor 350. They have big bore kits for it and everything. I even think its air cooled. You can probably pick one for a 1500 or cheaper.

350 warrior
actually we are looking at those for the next level of MXT karts

you can pick up the whole quad for $1500.

Not as much HP but the MXT karts only weigh 400lbs so it would work great

**ihcj9** · 01-11-2012 02:45 PM

Models,,,,,blond or brunette?

cad models? yes, pics are on earlier pages of this thread

How much HP out of the Briggs V twin?
20hp stock but with upgrades what are you shooting for?

there would be room for these motors and a cvt jack shaft set up.

But you lose reverse

Now that I have had it for a few years,,,,,,,I really like reverse

Ah - the pics must not load up at work...

We are pushing 49hp and 42 ftlbs of torque at 7000 RPM out of a V-twin Briggs on 110 octane. I'm swapping to methanol this year and should hit around 58-64 hp. That's all with decked block, ported and polished heads with big valves, twin carbs. 13:1 compression, etc. A bit overkill for a trail machine: a 450 or 700 motor will be just fine.

I was running a Polaris tranny for HLNR and it worked decent. Under hard racing I blew out a housing. Now i'm running a RPM.

**ProtoDie** · 01-11-2012 03:37 PM

Nice power out of the Briggs.

We have been messing with the 6.5 and 13 hp clone motors on the kids karts for a few years now.
6.5 motors are screaming now. 390 clone (13hp)up grade parts are pricey enough to where we started looking at smaller shifter motors.
Plus,,,,,kids need to learn how to shift and race

crazy,,,,you can get a GSXR 600 for cheaper than a 450,,,but no reverse

**TALON** · 01-11-2012 03:53 PM

Ya dont stand still to long do ya ,no rest for the wicked,That is what we lack over here ,some decent entry level stuff for the younger ones,I like the nose area with the lights tucked in very neat .I think they will be a winner good luck with em. When you planing to strike a blow on those .
Never mind rat how bout a 42 year old thats not so well behaved

**nutnbolt2002** · 01-11-2012 05:27 PM

I like the concept, but wondering on the cost to building that rear end setup.

**ProtoDie** · 01-11-2012 07:40 PM

cost and weight will be less than cv's axles,,,stub axles,,,IRS

930 cv's and axles alone are $450

which is one of the main reasons I am going this route,,to design and build something more affordable.

independent dual a arm would have been much easier,,,since we have already been doing that for years and I have parts on the shelf.

hmm,,,another reason may be I just needed a new challenge

Talon,,,I would have to split custody with Wendy,,,,every other weekends?
traffic would be a bear from running you back & forth