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Have an engineering mindset? Here’s your place to discuss the dirty details of dirt bike design, fabrication, & significant modification.

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Topic	Stats	Last Post Info
Converting a MX 250cc 2-stroke to a Woods Bike? Started by decooney , 15 Nov 2009	7 replies 459 views	PowerFiend 24 Nov 2009
KTM 525 sx 2006 piston and con rod Started by ktm525-06 , 22 Nov 2009	5 replies 295 views	ktm525-06 23 Nov 2009
wr 450 de compression system not working Started by glooga , 22 Nov 2009	1 reply 106 views	keith hammond 23 Nov 2009
Transmission Problems Started by samsymmans , 23 Nov 2009	3 replies 157 views	keith hammond 23 Nov 2009
CRF70 restore project- did I screw up? Started by dougheile , 22 Nov 2009	3 replies 328 views	robby17 23 Nov 2009
Working Temperature range KTM 520EXC Started by dynex , 23 Nov 2009	0 replies 92 views	dynex 23 Nov 2009
The New Suzuki Dr350 X / Rmz 250 Convesion Hybrid ! Started by muddy rascal , 04 Oct 2009	18 replies 2233 views	mini_S_man 22 Nov 2009
decompression system Started by 08yz450thumper , 21 Nov 2009	2 replies 128 views	Markopolo400 22 Nov 2009
04 rm250 knock Started by maxis417 , 07 Nov 2009	7 replies 242 views	robby17 22 Nov 2009
kx80 connecting rod clearance???? Started by robby17 , 22 Nov 2009	0 replies 134 views	robby17 22 Nov 2009
Can you Started by adrniln , 20 Nov 2009	2 replies 106 views	Biddyboo 21 Nov 2009
wr450 ignitition button Started by glooga , 21 Nov 2009	0 replies 73 views	glooga 21 Nov 2009
piston polish benefits? Started by trk98 , 17 Nov 2009	6 replies 1168 views	Gear-head 21 Nov 2009
No Spark Started by Welshman-78 , 20 Nov 2009	4 replies 109 views	SRAD97750 21 Nov 2009
Carbon in the ring grooves Started by motoxvet , 20 Nov 2009	0 replies 112 views	motoxvet 20 Nov 2009
XL350 Electrical Query Started by Buzachaka , 19 Nov 2009	1 reply 89 views	brewster 20 Nov 2009
custom transmission work (undercutting gears) Started by moto1crf450r , 18 Nov 2009	8 replies 915 views	moto1crf450r 20 Nov 2009
fly wheel weight...srry if i sound like a noob Started by crazyjimmydrz400sm , 12 Nov 2009	6 replies 283 views	highmarker 19 Nov 2009
wheel bearing snap ring retainers? Started by isaac338 , 19 Nov 2009	0 replies 143 views	isaac338 19 Nov 2009
water pump seal problems!!! Started by rmitchell7 , 19 Nov 2009	1 reply 81 views	samras121 19 Nov 2009
Is this the end of conventional valves? Started by D-K , 28 Oct 2009 1 2 3 5 →	Hot 86 replies 2976 views	motoxmann 19 Nov 2009
Small hole in my gas tank Started by jkelly81 , 14 Nov 2009	7 replies 596 views	motoxmann 19 Nov 2009
What About The Other Stuff? Started by lawnman , 18 Nov 2009	2 replies 141 views	KJ790 19 Nov 2009
Varying 2-stroke "stinger" diameter Started by rayivers , 05 Nov 2009 1 2 3	Hot 45 replies 4210 views	harrperf 18 Nov 2009
4 Stroke Oil? Started by kurt55 , 11 Nov 2009	3 replies 296 views	crf-f crf-r trx cbr 18 Nov 2009
18" v. 19" rear wheel Started by Blur , 11 Nov 2009	7 replies 385 views	William1 18 Nov 2009
Aluminium coolant pipes for extra cooling? Started by Ben Moto Soul , 04 Nov 2009	17 replies 847 views	Ervin 17 Nov 2009
klr-250 electrical problem Started by kdxFREAK42 , 15 Nov 2009	1 reply 206 views	willie 15 Nov 2009
2007 Honda crf25x Cylinder head Started by conor218 , 12 Nov 2009	2 replies 225 views	conor218 15 Nov 2009
Rev Counter?? Started by SA DR 600 , 03 Oct 2009	2 replies 232 views	SA DR 600 13 Nov 2009