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Found 77 results

  1. Hi, i recently rebuilt my CRF 250r it has a plus 2mm stroker crank a 280cc cylinder works cylinder vertex piston, hot cams stage 2, pro circuit titanium valves. pc valve springs a new cam chain. when i got the bike it was completely stock and it started on the first kick. now after being rebuilt it takes 10-15 kicks to start. but once its warm it runs fine idles great and you can shut it off and start it back up with 1-3 kicks. also it kicks over very hard regardless and has lots of compression.. is this normal ? also the gas is old and sat in the tank for about a month.
  2. i have a 2007 yz125 that i noticed has a little drip of oil coming from where the drain bolt is so i went to change the oil to see if it was the washer but i soon realized that my case is cracked, so i sent it to someone who used a JB weld (not sure what that is) and the dripping of oil stoppped but i realized about a week ago that the oil is coming out more, can anyone tell me what to do or how i can fix this.
  3. 4 reviews

    Includes crankshaft, main bearings, complete bottom end gasket set, including all seals and gaskets needed for the job The crank pin bearings are manufactured from the highest quality hot rolled steel. Case hardened to 58-62C The caged needle roller bearings provide the highest possible RPM Complete gasket kits are made from premium materials for maximum sealing and reliability Complete kits have everything needed for your rebuild All bearings are OEM quality for reliability and performance
  4. kxfchris

    Kawasaki KX250F (2009)


    Working on getting it tuned and running properly
  5. Denver Mike

    Honda CR250R (1978)


    Still trying to figure this bike out. I raced one when I was 17, back in the day !!! Love the classic looks. <br /><br />I've raced the bike x 2 in 2015, and found a number of problems, so I've actually completely rebuilt the engine, and replaced the carb with a Mikuni. Seems to run really nicely now. Looking forward to the 2016 season !!
  6. hey guys well I ended up ordering a wiseco top & bottom end kit. I always thought Wiseco made quality stuff. I always review stuff I buy, for some stupid reason I didnt with this. I just assumed Wiseco was good. looking at motosport.com, ebay, rockymountain all reviews were good. only on the forums is where they seem to get bashed. I havent installed it yet, a friend of mine who has been doing engine rebuilds for years, and does 2 stroke & 4 stroke motorcycle repairs for a living has always recommended them, and stands behind his work. After doing more research the reviews are mixed. I am having second thoughts and am wondering if I should return it. My bike runs great. its a 2004 with stock piston and crank, only the rings have been replaced, according to previous owner. so what should I do? here is where I bought it from http://www.ebay.com/itm/130864290234?item=130864290234&viewitem=&sspagename=ADME:L:OU:CA:3160&vxp=mtr
  7. ThumperTalk

    Hot Rods Bottom End Kit

    10 reviews

    Owners have the choice between Hot Rods Heavy Duty OE replacement crankshafts or Hot Rods Heavy Duty Stroker Crankshafts Kits feature everything needed to complete crankshaft installation including Hot Rods main bearings and seals kit plus a complete engine gasket set that includes all gaskets and seals for complete engine rebuild Stroker Kits crankshaft assemblies add to the length as listed depending on application; in some cases cylinder head must be modified (as noted)
  8. joehicks

    Hot Rods or OEM

    Anyone have any input on the Hot Rods Crank kit. Should I go OEM or is the Hot Rods a viable alternative?
  9. I purchased my first bike, a 2002 yz125, I bring it home ride it for awhile and then it just starts pissing coolant and gas everywhere, literally no compression, my friend comes over and tells me I'm gonna need a full rebuild he names a bunch of stuff wrong with it cracked case and a bunch of other stuff, I'm sick to my stomach about this bike, can someone please tell me how much this will cost to fix
  10. Stichris

    Yamaha YZ250F (2007)


  11. SS109

    Kawasaki KDX200 (1990)

    1 comment

    I love this bike so much that I rebuilt it completely from one end to the other, inside and out!
  12. smallblocktuner

    KTM 450 SX-F (2013)


    2013 KTM 450 XC-F Love it!
  13. DarkCRF

    Honda CRF250R (2011)


    Very like the ease to innitiate to this bike. Good suspension setup, nice handling but a little lack in power. I upgrade it throught the years with this : Suspension : Stiffer .46kg/mm Factory Connection fork springs, Factory Connection lowering link, thicker FF5 Factory Connection oil in the HSSD. So the bike is now more stable without sacrifying is handling Engine : C4MX ported cylinder head, Pro Circuit camshaft and complete valvetrain, Yoshimura RS4 full exhaust, Moto Tassinari Air4orce, TUF 43mm Throttle body insert, EBC HD clutch spring, Twin air filters, PC racing Pro seal, removed backfire screen with a remaped ECM by Eddie Sisneros. I have now a better response, strong power everywhere with a lot of overrev. Control : Renthal twinwall handlebar, Zeta rubber killer, Zeta fold back lever, Motion pro revolver throttle system, Motion pro grips, Tusk footpegs. Drive : DID VT2 Xring chain, Supersprox stealth 48 teeth rear sprocket, Supersprox 13 teeth front sprocket, Zeta axle blocs. Body : Custom plastics mix, Custom graphic kit, Factory FX B4 seat cover, Cycra full armor skid plate, Work connection Holeshot device, Work connection Radiators braces, Black rims, Red anodized look hubs, Michelin tire, Moose spokes set, Zeta, breather, clips, plugs, washer and cap. With all this upgrade the bike became a real beast on the track.
  14. Radtech

    Suzuki DR-Z400SM (2006)


    2006 SM model - Bought it in 2008 with 1800 miles, use it for commuting and riding on the weekends. Easy to work on and LOTS of stuff available for these bikes to make them better. Stock they are sort of a pig. Dropped a valve @ 71982 miles, had almost 60K on the Stroker crank and BB... Can't ask for much more from a single cylinder dirt bike. Several different motors and configurations over the 88K miles. Currently back with a stock bore and "E" cams. Still runs great and fun to ride, I miss the extra torque from the BB and BB/Stroker.
  15. runthemhot250

    Good four stroke pistons that last

    I have a new 2014 kx250f 10 hours on bike...she blew ....no fault of my own but either way I have to pay for it sooo does anyone know of any good pistons and valves to put in and also bottom ends just want something that will last for as long as oem this is a race bike but I need it to last a little because I'm not all about the new piston every 30 hours
  16. yzyamaha250

    Yamaha YZ250F (2015)


    In love with the bike, the power, handling, looks. Everything. Got the red white colour but like the star racing bikes so got new plastics and graphics kit.
  17. 1 review

    GENERAL INFORMATION Specializing in all KTM crank rebuilding. Supertrued within .0005"! http://www.cookseycrank.com
  18. xWilliee

    RM250 weak crankshaft?

    Hey guy's after my bike broke the crankshaft bearings and having the engine repaired, I've heard that that is common on RM250's, that the crankshaft bearings tend to fail. Is this in any way true?
  19. wyattedwards250

    Bottom End

    i recently purchased a 1990 yz 250 and have a notion that the bottom end is bad. Is there anything I should listen to, to confirm it with out having to take it apart?
  20. Okay so I picked up a non running 01 cr125 for $800. The seller said it just needed a top end. So I replaced the top end and cylinder head, new spark plug, cleaned the carb and air filter, all new fluids. After a few kicks it started up and ran for about 5 minutes then died. Now the kick start lever wont move at all. I tried to push start it and i didnt get any rotation on the rear wheel. Any ideas? I have a feeling its the bottom end and not the kick starter but this is my first 2 stroke so I'm still learning. Any help is greatly appreciated! I took everything back apart. Inspected the piston and head. It still looked brand new as it had only ran for 5 minutes. Thanks in advance for any advice/tips!