Planet Minis

T Bolt USA · 10-10-2009, 07:58 PM

New Stroker 117cc kit for CRF50 with 30mm/23.5mm valves !
TBolt USA, LLC » Pit Bike Engine Parts » Big Bore and Stroker Kits » Trail Bikes Stroker kit 117CC

chasetheface123 · 10-10-2009, 08:03 PM

Pm'd

Kurlon · 10-10-2009, 08:04 PM

Quote:

Originally Posted by crf88r

how much for just the head? will it work on the tb88 kit?

Look at the 54mm piston TB's using for a 117 setup... with that combustion chamber, I don't think you'll find a lump big enough to give reasonable compression without absolutely destroying flame front propagation. Plus, it may require a 54mm bore just to avoid valve to cylinder contact.

Kurlon · 10-10-2009, 08:09 PM

Quote:

Originally Posted by crf88r

ok so is there a way do de-stroke my bike and keep it 90cc's or less?

Same problem, taking that 54mm setup and running it on a shorter stroke to keep the displacement down, you still need a piston with more of a lump on top to fill that combustion chamber more than what you need to get the same job done with 117cc of displacement.

T Bolt USA · 10-10-2009, 08:20 PM

the pricing on just the heads , no cam is $219
only a 54mm /117cc piston is matched to this head
(for now)

this is a very exciting new product !

T Bolt USA · 10-10-2009, 08:25 PM

Quote:

Originally Posted by crf88r

would it even be worth it to have valves that big on my 88? I already have the tbrace head 25/22.

basically thats the point,this is a head designed for 117cc motors , im not going to say its cant work on anything but the design is clear

firepower354 · 10-10-2009, 08:34 PM

Quote:

Originally Posted by crf88r

well the last idea would be to machine the piston down to 52mm... can that be done? would it even be worth it to have valves that big on my 88? I already have the tbrace head 25/22.

Can't reduce the OD of a piston that much. Or at all, without pretty sophisticated equipment.

T Bolt USA · 10-10-2009, 08:57 PM

yes it a very good set up ,,,,,,,,,

Kurlon · 10-10-2009, 08:58 PM

Quote:

Originally Posted by crf88r

well the last idea would be to machine the piston down to 52mm... can that be done? would it even be worth it to have valves that big on my 88? I already have the tbrace head 25/22.

Ignoring the feasibility of reducing the OD of a piston...

Bore, stroke, it doesn't matter, it's the displacement that matters when discussing compression.

Compression Ratio = (Displacement + Combustion space at TDC) / (Combustion space at TDC)

The combustion space is the amount of space left between the piston and the head when the piston is all the way up.

TB typically specs their kit's around 11:1 compression, enough to provide some good bang, without risking detonation on crap pump gas.

So, lets plug in some numbers...

11 = ( 117 + Cv ) / Cv

Solve out for CV and you get 11.7cc of combustion volume space at TDC. So, lets say you use a stock crank instead of TB's stroker crank to keep the displacement down. The piston sits in the same spot at TDC, so the Cv changes, we've altered the displacement. (54 x 41.4 = 95cc)

Compression Ratio = ( 95 + 11.7 ) / 11.7

This drops you to a 9.1:1 Compression Ratio. You need to find 2cc of additional 'stuff' to fill up that empty space at TDC to get the CR back up to 11:1.

firepower354 · 10-10-2009, 09:22 PM

FWIW, the valves will clear a 50mm bore, and the chamber is aboot 53mm. Quick mill job to <52mm. Piston would have to be sourced elsewhere.

klxrider245 · 10-10-2009, 09:30 PM

how much hp does this kit make?

SCAR8 · 10-11-2009, 08:18 AM

This sucks, now I have another item to put on my want list!!

50rider340 · 10-11-2009, 10:07 AM

Depending on the valve angles im wondering if a takegawa old super head piston would work? Cut the valve reliefs a little extra for the valves. I would def think the piston would have enough dome for it. only problem is the valve angles? They may be way different making you have to really cut a lot of material off the piston. There are definitely pistons out there for a 88 that would make enough compression with the right work it should be possible. I would think that this piston would make enough compression. I just dont know if the valve angles are off so much that it wouldnt work.

Or this kitaco 88 kit may work
http://www.hondaminitrail.com/GIFS/P621K.jpg

T Bolt USA · 10-12-2009, 12:42 AM

TB 165cc Bore kit for 4 valve heads
[TBW9057]
TBolt USA, LLC » TB Parts » KLX110 DRZ110 » TB 165cc Bore kit for 4 valve heads

Kurlon · 10-12-2009, 08:30 AM

Damn, that was quick!

dfred15 · 10-12-2009, 09:17 AM

I was going to buy a 117 kit to install on my 92 trail 70 project motor. Will this kit work with that motor?

T Bolt USA · 10-12-2009, 10:01 AM

Quote:

Originally Posted by dfred15

I was going to buy a 117 kit to install on my 92 trail 70 project motor. Will this kit work with that motor?

it will fit on this motor since its a newer 12v unit ,,,and it will RIP !

T Bolt USA · 10-13-2009, 07:28 AM

New more aggressive cams for V2 heads with matching pistons

TBolt USA, LLC » TB Parts » KLX110 DRZ110 » NEW TB cam kit for V2 race heads

mototim · 10-13-2009, 02:04 PM

Quote:

Originally Posted by t bolt usa

new more aggressive cams for v2 heads with matching pistons

tbolt usa, llc » tb parts » klx110 drz110 » new tb cam kit for v2 race heads

what is this comparable to s25 or s35 and what is the price for just the cam!!

T Bolt USA · 10-13-2009, 03:58 PM

Quote:

Originally Posted by mototim

what is this comparable to s25 or s35 and what is the price for just the cam!!

heres the new v2 more aggressive type cam listed online
Similar to the S35

(the original V2 cam was like an s25)

TBolt USA, LLC » Pit Bike Engine Parts » CAMS » NEW TB cam for V2 race heads

10-10-2009, 07:58 PM	#1 (permalink)
T Bolt USA Advertiser Join Date: Jan 2005 Posts: 4,784 My Mood:	NEW TB Race head 30mm for Crf50 and More @ T Bolt USA New Stroker 117cc kit for CRF50 with 30mm/23.5mm valves ! TBolt USA, LLC » Pit Bike Engine Parts » Big Bore and Stroker Kits » Trail Bikes Stroker kit 117CC __________________ T Bolt USA ALL top Pitbikes ,Engines and Parts for Pitbikes & Minis Website Contact THECRKID@TBOLTUSA.COM or Call 215-630-3554

10-10-2009, 08:03 PM	#2 (permalink)
chasetheface123 Chuck Norris for president! Join Date: Nov 2007 Location: Boyne City Michigan Posts: 4,811 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA Pm'd

10-10-2009, 08:20 PM	#5 (permalink)
T Bolt USA Advertiser Join Date: Jan 2005 Posts: 4,784 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA the pricing on just the heads , no cam is $219 only a 54mm /117cc piston is matched to this head (for now) this is a very exciting new product ! __________________ T Bolt USA ALL top Pitbikes ,Engines and Parts for Pitbikes & Minis Website Contact THECRKID@TBOLTUSA.COM or Call 215-630-3554 Last edited by T Bolt USA; 10-10-2009 at 08:24 PM.

10-10-2009, 08:57 PM	#8 (permalink)
T Bolt USA Advertiser Join Date: Jan 2005 Posts: 4,784 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA yes it a very good set up ,,,,,,,,, __________________ T Bolt USA ALL top Pitbikes ,Engines and Parts for Pitbikes & Minis Website Contact THECRKID@TBOLTUSA.COM or Call 215-630-3554

10-10-2009, 09:22 PM	#10 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 10,989 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA FWIW, the valves will clear a 50mm bore, and the chamber is aboot 53mm. Quick mill job to <52mm. Piston would have to be sourced elsewhere. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

10-10-2009, 09:30 PM	#11 (permalink)
klxrider245 3rd Gear Member Join Date: Nov 2004 Location: RIVERSIDE Posts: 1,014	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA how much hp does this kit make?

10-11-2009, 08:18 AM	#12 (permalink)
SCAR8 3rd Gear Member Join Date: Oct 2006 Location: Springfield Mo. Posts: 2,119	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA This sucks, now I have another item to put on my want list!!

10-11-2009, 10:07 AM	#13 (permalink)
50rider340 3rd Gear Member Join Date: Mar 2004 Location: CT Posts: 3,082 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA Depending on the valve angles im wondering if a takegawa old super head piston would work? Cut the valve reliefs a little extra for the valves. I would def think the piston would have enough dome for it. only problem is the valve angles? They may be way different making you have to really cut a lot of material off the piston. There are definitely pistons out there for a 88 that would make enough compression with the right work it should be possible. I would think that this piston would make enough compression. I just dont know if the valve angles are off so much that it wouldnt work. Or this kitaco 88 kit may work http://www.hondaminitrail.com/GIFS/P621K.jpg

10-12-2009, 12:42 AM	#14 (permalink)
T Bolt USA Advertiser Join Date: Jan 2005 Posts: 4,784 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA TB 165cc Bore kit for 4 valve heads [TBW9057] TBolt USA, LLC » TB Parts » KLX110 DRZ110 » TB 165cc Bore kit for 4 valve heads __________________ T Bolt USA ALL top Pitbikes ,Engines and Parts for Pitbikes & Minis Website Contact THECRKID@TBOLTUSA.COM or Call 215-630-3554

10-12-2009, 08:30 AM	#15 (permalink)
Kurlon Super Moderator Join Date: Feb 2005 Location: Windham, ME Posts: 8,301	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA Damn, that was quick!

10-12-2009, 09:17 AM	#16 (permalink)
dfred15 2nd Gear Member Join Date: Sep 2006 Location: Holley, New York Posts: 380	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA I was going to buy a 117 kit to install on my 92 trail 70 project motor. Will this kit work with that motor?

10-13-2009, 07:28 AM	#18 (permalink)
T Bolt USA Advertiser Join Date: Jan 2005 Posts: 4,784 My Mood:	Re: NEW TB Race head 30mm for Crf50 and More @ T Bolt USA New more aggressive cams for V2 heads with matching pistons TBolt USA, LLC » TB Parts » KLX110 DRZ110 » NEW TB cam kit for V2 race heads __________________ T Bolt USA ALL top Pitbikes ,Engines and Parts for Pitbikes & Minis Website Contact THECRKID@TBOLTUSA.COM or Call 215-630-3554

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)