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Author Topic: GPX Motors to build TS 550 R Two Stroke  (Read 1005 times)
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umberto
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« on: August 23, 2018, 04:38:48 PM »

They announced on Instagram that they will be working with a Canadian firm to build 550 cc two strokes for a bike and snowbike.  These guys seems pretty serious about this two stroke thing.

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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
umberto
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« Reply #1 on: August 23, 2018, 05:01:29 PM »

I missed the 100 HP claim they list in the first post.  Pretty sure that's not going to happen, but if it did that would be insane.   shocked
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
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« Reply #2 on: August 23, 2018, 10:23:30 PM »

I'm hearing that the cost will be about 9-10k... Nothing is confirmed as far as I know..
And I've heard that the 100 hp is accurate at the crank..
But reality will show it's ugly head when they hit the market in volume.
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.
alward25
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« Reply #3 on: August 24, 2018, 07:30:27 AM »

$6,400 for the e-start/kickstart model.  Less if you want only one or the other.
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umberto
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« Reply #4 on: August 24, 2018, 07:32:43 AM »

$6,400 for the e-start/kickstart model.  Less if you want only one or the other.
Is that just motor, or the whole bike?  I'm guessing just motor, seeing as it's not made in China.
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
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« Reply #5 on: August 24, 2018, 07:47:48 AM »

$6,400 for the e-start/kickstart model.  Less if you want only one or the other.

Wow! Way less then I heard...
If the HP numbers pan out and they have good longevity I'm sure they will sell a few...
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.
umberto
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« Reply #6 on: August 28, 2018, 09:07:48 AM »

GPX Posted some numbers for the 550:

Volume / Bore / Stroke: 548 cc / 94 mm / 79 mm
Power: 92-102 HP (with an asterisk)
Torque: 65-72 lb-ft (also with an asterisk)
Weight: 72 lb / 32.7 kg
Transmission: 6 speeds
Exhaust Control: Piston power valve
Intake system: Carbon fiber reed valve

The asterisks did not lead to anything, so I'm not sure what they were trying to say on the HP and torque.  It will be pretty impressive if it comes anywhere close to those numbers. 
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
Heniz
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« Reply #7 on: September 06, 2018, 10:57:08 PM »

sign me up  afro
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« Reply #8 on: September 07, 2018, 06:52:31 AM »

Just food for thought... The Zero Electric dirt bike puts out 78ft of torque to the rear wheel...
Enjoy Big bore 2T a while longer until the battery tech gets cheaper and better...
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.
umberto
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« Reply #9 on: September 07, 2018, 07:49:34 AM »

Just food for thought... The Zero Electric dirt bike puts out 78ft of torque to the rear wheel...
Enjoy Big bore 2T a while longer until the battery tech gets cheaper and better...
At least we can buy an American electric bike. Not getting my dollars anytime soon, but you may be forced to buy one in certain states like California in the near future.
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
WRXBRUMBY
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« Reply #10 on: September 09, 2018, 04:49:11 AM »

Surely they will couple some of that EFI technology from the snow mobiles to get those numbers?
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2008 FE650 (KX500 but with manners and E-Start)
2003 KX500 Scares me! (Reminded me I couldn’t ride well)
1997 TE610 Arm chair! (Made me think I could ride)
2000 CT110 Fun!
1986 KDX200 SOLD! (But looking for another)
1970 AG100 Still makes me 😀
umberto
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« Reply #11 on: September 21, 2018, 01:23:56 PM »

I exchanged some messages with the guys at GPX today, and they verified some information for me.  The motor will be available in a chassis very similar to their 250, and the bike will retail for $10,000.  The motor can be purchased separately and will cost $6,000.  I asked him what size rear tire they would be going with on the bike, but I haven't heard back yet.  I'll update the thread when I get more information.
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
kawrider
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« Reply #12 on: September 22, 2018, 07:52:19 AM »

They must be getting the motor built by these guys?

https://www.pantheramotorsports.com/us/
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umberto
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« Reply #13 on: September 22, 2018, 09:44:23 AM »

The picture on Instagram did have that logo on the clutch cover. These are the same guys who are making the electric start for 500s, so it makes sense that they would want to make a whole engine. Good catch!
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525 - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144
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« Reply #14 on: September 22, 2018, 03:03:57 PM »

I hate to be a party pooper but....
I'm pretty sure they are not the same company.
I know Roost (Adam Millar) would know as he helped develop that engine...
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.
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