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Found 300 results

  1. Bike has all of the normal mods including the JD kit, baffle removed and has been de-smogged . Trying to get a baseline to set the mixture screw out. I have read anywhere from 2-3 turns, but have not been able to set and ride to tune. It will start without the choke at 3 turns, so obviously that is too rich. Any help is appreciated as I am new to four strokes
  2. DRZeed

    help me rejet

    09 drz...fmf q4 slip on....25 degrees today,bike starts but stalls anything over half throttle...what main and pilot jets can i use with only the slip on? NO 3x3, no JD jet kit. Thanks
  3. Hayden69

    What carb to buy?

    I bought my first DRZ 400 SM. It's a 2005 with 5600 miles on it and its all stock. I want to by a bigger carb for it first. My question is do I go with a 39 mm or a 41mm? My plan is to get the Yoshimura RS-4 exhaust too. A little advice would be helpfull.
  4. Drz with a 440 kit, cams and full exhaust. Installing an oem 01 Fcr39. Sea level to 1500ft. OBDXP needle, 142 main. Should I be ok as is or get some more parts? Thanks
  5. yousef1

    Honda CRF230F (2007)


    super nice bike that i was able to make a dual sport bike out of. has many mods and is easy to maintain. bike has enough power and speed. easy and fun to ride and never get tired of or while driving. Mods wanted: Brazilian 300cc big bore set, sunline flexi levers,honda crf250l head light, hydro clutch, trx450r rear shock, cr250r forks,
  6. Rukix

    Suzuki DR-Z400S (2001)


    This Bike is great! On or off road you have excellent power/acceleration once you do a few simple mods. It is very maneuverable, easy to handle and just out right fun to ride.
  7. So, I have an issue. Might be jetting, might not be jetting. This is gonna be long, but please bare with me and read on. I'll try to describe the issue best I can. Bike is a 2014 DRZ400SM with just under 5,000 miles. Mods are 3x3, Powerbomb header with the Powercore 4 muffler, and a JD jet kit on the stock BSR36 carb. Current jetting is 160 main, blue needle 4th clip, stock pilot, and the extended fuel screw which is currently at 3 turns out. I've tried the fuel screw at anywhere from 2.5 to 3 turns out. Temp today was mid 40's and sunny. Elevation is sea level to maybe a couple hundred feet above it. The issue I am having is at higher rpms with low throttle input. A perfect example was tonight I was going 52mph around a corner in 4th gear just holding a steady speed through the corner. It started doing it, I then looked down and the speedo showed 52, I looked back up to continue through the corner. The throttle position was about 1/4 throttle, maybe 1/3rd throttle at the very most. I don't have a tach, so I'm not sure what rpm a DRZ400SM with stock gearing is doing in the low 50's in 4th gear. My best guess would be maybe 6,000 rpm. It's definitely not near the limiter, but right in the thick of the powerband. The best way to describe the issue would be that it feels like it's running out of gas. The same kind of feeling you get when you have to switch to reserve on the tank. If I give any additional throttle input it'll accelerate right through it perfectly fine. I wouldn't call it a bog, because if I roll on the throttle or crack it open to full throttle the response is instant and it just accelerates right through it. It just feels and sounds like it's breaking up when trying to hold the throttle at a steady position. The first time this happened was in 5th gear at about 70mph So I originally thought that I had the dreaded 70mph stutter that many people have complained about. Then I started to notice it in other gears at other speeds. Tonight I checked my spark plug. I think it looked fine, I'll put up a pic, but I went out and grabbed a new one anyway since they only cost 4 dollars and change. I also turned the fuel screw out to 3 turns instead of the 2.75 turns it was at. Also put some Lucas brand fuel system cleaner in my tank. The issue I just described is still happening after the new spark plug and the screw being turned out the extra 1/4 turn. The bike runs perfectly otherwise. Starts up instantly, even starts up cold without any choke anytime it's above 40 degrees outside. Idles perfectly smooth. Throttle response is crisp and instant. Bike pulls strong and hard. The top end pull isn't anything special, but it's a mostly stock DRZ. It'll pull 3rd gear power wheelies at around the 30mph mark with just a slight tug on the bars. Decel popping isn't anything out of the ordinary, but it does do some light popping sometimes, but nothing I'd call excessive. The bike runs great otherwise. This issue isn't stopping me from riding it, but it's kind of annoying. Sorry this got so long, but if you have any ideas or suggestion I'd like to hear them. I'm out of ideas.
  8. On my 2009 crf250x with opened up airbox, R exhaust, and jd jet kit has a mean decel pop and I have been told its because it's lean. I have also been told that it's lean if your hotstart doesn't bring the bike up to higher RPM's when you open it and ATM with a 41 pilot in, when you open the hotstart the bike dies. During the summer I was messing around with the fuel screw and at like 2 1/2 - 3 turns out, the poping on decel is nearly gone and the hotstart increases the RPMs, so I put in the next bigger pilot jet (41 to 43) and the bikes power delivery was messed up (no bottom end like a 125 two stroke) and the popping stayed. What is there to do if on the 41 with the screw almost falling out, the poppings nearly gone and the hotstart works but with the 43 (don't remember where I had the fuel screw at) the bike performs like crap and still has popping? I really need help on this. I have heard that the copper ring in the header might have worn down aswell as the smog pump could be a culprate too to the popping. Please help this popping is driving me insane and haven't gotten a straightforward answer yet.
  9. Lahms

    KTM 250 SX (2017)


    Bike is fantastic and rides well. Only gripe is the reeds(gappy) and the stock carb(mikuni is a pos). Other than that, its a masterpiece. No vibration, very good air forks, and super light weight make it awesome. Equip with with a Keihin carb and VF4 reeds and go ride. I got my bike as a used demo bike, it had 24 hours on it, priced at $5600, $2100 off MSRP. Got a fantastic deal!
  10. 0 reviews

    The fuel mixture screw in your bike is critical and its adjustment should be done every time you ride. The Merge FMS has a unique “T” shape to it that always allows the rider to have positive action on the fuel screw. Even with gloves on! Fits all Keihin FCR MX carburetors. - Superior product for the same price. - Brass material to increase life span. - Quality injection molded knob for easy adjustments. - Improved fit for better resistance to backing out due to vibration. - Supplied with spring, O-ring and washer so you don’t have to worry about losing the stock ones!
  11. 2 reviews

    This kit is designed for Big-bore and stroker modified DRZ's only. If you have a stock bore and stroke DRZ 400, you need the FCR39 kit. This kit includes: - Keihin 41mm FCR Carb with choke (no TPS) - FCR Adapter 2 3/8", carb to S airboot** - Adaptor O-Ring** - EMR or EMS Needle** - Airboot adapter bolts (2)** - P/N 13111-29F00 OEM Suzuki E Intake Manifold - P/N 09402-58208 OEM Suzuki Clamp - P/N 13685-29F00 OEM Suzuki Vacuum Port Nipple Carb comes standard with the following: - 200 Main Air Jet - 160 Main Jet - 45 or 48 Pilot Jet - 100 Pliot Air Jet - EMR or EMS Needle This kit is tested and approved by Eddie "Burned" Sisneros Installation instructions included - you can also find updated tips, tricks, hints and answer to common questions in the ThumperTalk Forums.
  12. 1 review

    Allows for no tools track or trail side tuning on your four-strokes FCR carburetor, improving idle performance Crisp, clean, positive throttle response with one finger CNC-machined from durable 7075 T-7 billet aluminum Brilliant red anodized finish and task specific designed EZ Dial knob with etched numerals Features an O-ring design to resist engine vibration and increases accuracy and longevity
  13. 1 review

    Complete kits to rebuild OEM carburetors Each kit contains all necessary gaskets, O-rings, float valve and jets
  14. TheLittleYellowThatCould

    Suzuki DR-Z400SM (2006)


    pretty great after you throw too much money into it! lol
  15. dmbowers98

    Suzuki DR-Z400S (2015)


    This is my 3rd DRZ, only now am I getting into modifying and adding more power. I love it. For the price, reliability, and fun, its perfect.
  16. Neo2tth

    Yamaha YZ426F (2001)


    When I bought it, there was a LOT of work needed to get it started and keep it running. But with some TLC (carb rebuild), multiple parts replaced, and rewiring for lights) I've been able to turn it from a potentially great bike into an excellent bike to take on trails and the roads. Technical track riding is not my style, but this bike would be right at home there. Overall, this will be in my collection for a long, long time.