KC's 4-stroke 3-speed on GT2A-S gas tank frame

I have been itching to build a high end bike from the ground up on the cool Grubee GT2A frame designed specifically for motorizing from the in-frame 2.5L 2/3 gallon tank to the engine friendly frame geometry and I finally have my chance.

I have a customer that wants a 4-stroke 3-speed shifter like Big Red, but without the 'barnacle' gas tank.

2_BigRedDoneL.jpg


I went through all the common options but as his budget grew so did the options until we got to GT2A frame which made for a ton more options.

Anyway, other than a base color theme and look I had him start with from the options of 3-speed wheel sets I have a big pallet to work with.

After an hour in my local bike shop with nothing but the bare painted frame and wheel set I got it on it's feet and rolled it out the bike shop door yesterday.

GT2firstLook2.jpg


The is no easy way to explain how cool it is to have great little small business bike shop around corner that has actually grew to accommodate my business needs with MB enthusiasm.

They have a work space for me to do things so I looked at tire options and finished the wheels and then moved on to picking the right fork, headset, handlebars and seat post by trying them on and looking at it.

But back to the build...
I had my local auto painting place paint the frame, chain guard, all the SBP 4-stroke shift kit parts and other misc parts to exactly match the rim color.

They did a nice job.
3 coats of primer, 2 coats of paint, and then 3 coats of sealer on everything.

Some parts specs:

Fork:
RST CAPA
Weight 1980g
Axle to Crown Length 460mm
Crown Race 30.0
Brake Type Cantilever, Disc, Linear Pull
Wheel Size 26"
Travel 80mm
Front Hub Spacing 100mm
Front Axle Type 9x1
Spring Coil
Wheel Mount Center Offset 0mm
Steerer Type Straight

KORE headset with 5 1/2" forward offset and 'just right' beach cruiser handlebars.

Tire Parts:
Standard inner liner.
Sunlite 6321 HD thorn resistant tube.
Thick 'special material' outer liner.
Kenda K1008 Flame 26x2.125" Cruiser Tires.

I really like Kenda tires and the cool flame tread design and not just because my wife's name is Kenda ;-}

Obviously more to come but I couldn't resist posting about this new build as it comes along from this point ;-}

*Note I made a topic here http://www.motoredbikes.com/showthread.php?42525-GT2A-S-in-frame-tank-frame-for-MB-s
with pics and specs for a real close up look at what th4 GT2 frame is and what is really required to build any MB with this frame as the base so please refer to it for frame details.
 
I'd love to do a build with that GT2A frame. However, with our nebulous motorized bike laws in TX, I fear the local law men would consider it a "motorcycle" because of the in frame tank. and require me to tag it.
 
It really sucks being a perfectionist sometimes, and it's not firgg'n cheap or a one man job in cases like this either, but that's what it takes to meet my standards and I start from the ground up.

I know, bla bla bla, until you look closer and see the progression of how you fit stuff as you go as it sucks to go backwards and why we spent all day just getting the JS pedal drive train perfect, the wheel aligned perfect, and then perfect fitting 3-point mounting fenders on it.

GT2FirstLook3.jpg


It doesn't look much different than my first pic which was the whole point, I'll post the details later but here is a tip for getting stickers off.

Just use the end of a lemon which is easy for me, I have a big lemon tree full of ripe lemons.

LemonStickerRemoval.jpg


To me it's all the little subtle stuff you can do as you go and why I including it as I go for all you guys that think you might want to use this frame and I hope it helps ;-}
 
It turns out the SickBikes 4-stroke Jackshaft kit motor mount base once all the muffler clamp parts are in place is over an 1" longer than the direct drive 4-stroke base the frame was designed for thus moving the engine position up to the point of the top bar interfering with function.

We spend the morning fabing some mount changes that should work and as the parts paint drys outside we went to work on getting the bike ready to just drop the mount and engine in and hook it up.

Pictures just don't compare to looking at it person and even riding it around as a pedal bike but I did what I could to get some pics from my alternative photo wall for this late time of day.

GT2secondLookLeft1280.jpg


GT2secondLookLeftTurned1280.jpg


GT2secondLookLeftTurnedClose1280.jpg


GT2secondLookRight1280.jpg


GT2secondLookRightRearTurned1280.jpg


Needless to say we are chomping at the bit to get the engine in and ride it tomorrow ;-}
 
Wow! I can't wait to see the outcome! also I noticed it looks like your fork can accept a disc caliper. Going to run a front disc brake down the road? Looking forward to more pictures!
 
Wow! I can't wait to see the outcome! also I noticed it looks like your fork can accept a disc caliper. Going to run a front disc brake down the road? Looking forward to more pictures!
The hub doesn't have a disc mount so the chances it will ever get a disc are slim as dual V's work great here in Phoenix but the option is there should the customer ever want a front disc.

Here are the pics above in 1280 wide versions.

Image: http://KCsBikes.com/pics/GT2secondLookLeft1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookLeftTurned1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookLeftTurnedClose1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookRight1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookRightRearTurned1280.jpg
 
The hub doesn't have a disc mount so the chances it will ever get a disc are slim as dual V's work great here in Phoenix but the option is there should the customer ever want a front disc.

Here are the pics above in 1280 wide versions.

Image: http://KCsBikes.com/pics/GT2secondLookLeft1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookLeftTurned1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookLeftTurnedClose1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookRight1280.jpg

Image: http://KCsBikes.com/pics/GT2secondLookRightRearTurned1280.jpg
You'd have to buy a wheel that could accept a disc or build your own with a disc hub. You probably already knew that.. But as long as the brakes are working fine, great! In my experience, it seems that the MAB's chew through pads quickly, only happens with some of my builds not all. So, I just try braking as little as possible to avoid excessive wear and tear.
 
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