HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

DR-Z 400

This forum is shared with the Kawasaki KLX 400

Check out the ThumperTalk DR-Z400 Specialty Store.

Subforums

  1. DRZ400 FAQ

    Step-by-step HOWTOs, Fix's, Tips and Tricks

    If you have a question, please look in the FAQ before posting.

    All new DRZ riders, or new to TT should read this sub forum first.

    35
    posts

105,183 topics in this forum

    • 5,979 replies
    • 679,457 views
    • 11,031 replies
    • 3,409,951 views
    • 91 replies
    • 82,324 views
    • 0 replies
    • 32,930 views
    • 3 replies
    • 34 views
    • 15 replies
    • 55 views
    • 59 replies
    • 850 views
    • 7 replies
    • 41 views
    • 1,160 replies
    • 372,674 views
    • 8 replies
    • 77 views
    • 0 replies
    • 14 views
    • 12 replies
    • 316 views
    • 29 replies
    • 688 views
    • 9 replies
    • 49 views
    • 12 replies
    • 94 views
    • 4 replies
    • 52 views
    • 3,848 replies
    • 121,344 views
    • 6 replies
    • 105 views
    • 0 replies
    • 30 views
    • 17,966 replies
    • 1,627,362 views


  • Featured Content

    Over 230 Bikes in 19 categories, over 30 tracks in 7 categories, 11 game play modes! Enter to win a copy of Ride2!
    CLICK HERE to enter for your chance to win one of 50 digital copies of Ride2 for your PS4 or Xbox One Each bike model boasts an unrivaled level of precision, the vast roster of bikes includes models for major manufacturers such as Yamaha , Kawasaki , Ducati , Aprilia, BMW, Suzuki , Triumph and much more. Ride2 is featuring more than 190 bikes, new models and categories, like the legendary Two-Strokes for real fans, the Supermoto with their ad hoc physics and the Café Racers with their retro style. Travel around the world in an unforgettable and extraordinary sequence of events: GP circuits, country tracks and city tracks. Over 30 tracks, including the legendary Nürburgring Nordschleife. Set up your bike by customizing the aesthetics, motor, brakes, suspension and transmission and enjoy more than 20 brands in Ride 2 to bring your rider to life, choosing gear and riding style!16 game modes: speed down the queen of tracks, Nürburgring, ride in typical motard style and slalom race through street cones for the most enjoyable riding experience ever!   Choose from nakeds, superbikes, supersports, electric bikes and, let loose on one of the numerous two-stroke bikes, café racers and supermotos!   > Over 230 Bikes in 19 categories, over 30 tracks in 7 categories, 11 game play modes, more than 300 career events and than 30 different customizable parts for a tailored bike and rider > Collect bikes to create your personal and stylish garage, choosing between the most important manufacturers, different bike models and categories of vehicles (Naked, Supersport, etc) > Brand new tracks: Travel around the world in an amazing sequence of unique events: GP Circuits, Country Tracks and City Tracks. More than 30 tracks, including the legendary tracks and events like the Nürburgring Nordschleife, Macau, the Ulster GP and the Northwest 200 > Structure: The structure of the game gives the player a deeper progression and always a new reason to play, thanks to the World Tour, the World Ranking and more exclusive Invitational Trophies > Rewards: The skill points reached will be spent in a Reward Tree that grants the player prizes and bonuses (bikes, discounts, credits, etc) > Social Features: Import the avatar of your friends inside your game, use them in team races, check their profile to see their bikes and loan them > Realistic simulations: The game includes an accurate physics model that allows players to ride a bike as a real rider. Every bike has a specific set up of the engine and of the mechanics and supports specific animations of the rider > Customization: The connection between the rider & his Bike is deeper than RIDE. RIDE 2 offers a wider customization section, 1200 parts focused on turning the stock version of the bikes in real Racing Replica Over 200 bike models New categories like the legendary 2 Strokes, the Supermotos and the Café Racers 30 different tracks with different topographic features each 18 of the world’s most important motorcycle manufacturers Over 1,200 customisable parts and over 600 different liveries that you can use to transform a motorcycle for everyone into YOUR own custom bike CLICK HERE to enter for your chance to win one of 50 digital copies of Ride2 for your PS4 or Xbox One  
    Posted by Bryan Bosch on Feb 15, 2017

    EVS R4K Race Collar
    The R4K is a completely new race collar for 2016. It features a revolutionary Koroyd™ core with superior impact absorption and a reinforced nylon upper shell. The chassis has been completely redesigned to be lighter and more aerodynamic. In an impact, the head is pushed down on the race collar. The R4K effectively fills the gap between your helmet and shoulder with Koroyd, which absorbs impact energy better than standard race collar materials.   - Koroyd® engineered core for superior impact absorption - Reinforced nylon upper shell - Lightweight, aerodynamic chassis design - Rapid lock closure system for easy front entry - Integrated X-Strap cleats - Polyurethane foam base - Sizes: Youth, Adult
    Posted by Russhole on Jan 27, 2017

    WORX GLOVES Worx Performance Gloves
    WORX PERFORMANCE GLOVES Now has a complete line of the  Best disposable work gloves in the Power sports industry. Our Gloves have been tested and used by all AMA professional race teams for several Years. Our Gloves range in thickness from 5mil-14mil for maximum protection from harsh solvents and chemical found in the professional workplace.  http://www.worxgloves.com/default.asp
    Posted by King Louie on Apr 14, 2014

    Help! - Bike Only Starts When Pushed
    Today I want to talk about a situation I hear all too often. Someone’s bike, whether it be a two-stroke or four-stroke, only starts when it is pushed. Before I discuss potential causes for this scenario, take a moment to think through the situation yourself. What mechanical factors would result in either a two-stroke or four-stroke only starting when it is bump started? In either case, the reason the engine is able to start when it is push started is because it is able to build more compression than it otherwise could when it is kicked or the electric starter is engaged. More compression is achievable because the cranking RPM is higher than what’s possible with the aforementioned starting methods. With a higher cranking RPM for a four-stroke, more air will fill the cylinder on the intake stroke, and for a two-stroke the scavenging process will be improved. With this being the case we must look at reasons why the engine is struggling to build compression in the first place. Starting problems specific to four-strokes: 1. Valve seat recession - When a valve seat wears out and recedes, the valve moves up towards the camshaft. This leads to diminished valve clearances and if left to run its course, the valve and shim will bottom on the camshaft’s base circle. The next time the valve clearances are checked the problematic valve will be re-shimmed so the clearances are correct. Once this is done, the valve will have a gap between it and its corresponding seat. 2. The valve is bent - A valve with a serious bow to it may get jammed up inside the guide and not return all the way back to its seat. Bent valves typically result from an over-revved engine where the valves contact the piston. Valves can also bend to a lesser extent if they were mated to valve seats that were not cut concentrically to the guides, or they were paired with worn seats. 3. The valve stuck in the guide - This is usually due to the engine overheating. When the engine overheated the clearance between the valve and guide diminished which caused metal to transfer from one part to the other, ultimately ruining the surface finish on one or both parts. Once this happens the valve may be prone to sticking in the guide until the engine warms up. 4. The valves and seats do not seal well - Worn valves and valve seats can compromise the seal between them. Valve and seat wear is a natural part of running an engine but can also be accelerated by ingesting dirty air. Starting problems specific to two-strokes: 1. The reed valve is worn - Reed petals that don’t close all the way, are chipped, or bent will not allow sealing of the crankcase and efficient gas flow up from the crankcase into the cylinder. 2. An engine seal or gasket has failed - A two-stroke engine requires a well sealed crankcase and cylinder in order for it to scavenge gases efficiently. A worn crank seal, leaky base gasket, or problematic power valve seal can all make starting more difficult. Two and four-stroke problems: 1. The piston rings are worn - Worn piston rings will allow compressed gases to escape past them. 2. The head gasket or o-rings are leaking - Usually a leaking cylinder head will be accompanied by white smoke if coolant is being pushed into the combustion chamber, by coolant being blown out the radiator, or both. I hope you found this rundown of potential problems useful for diagnosing bikes that like bump starting over a kick or the push of a button. Can you think of any other problems that would lead to lack of compression? If so, leave a comment and share them. If you liked this post and want more technical info, check out my book, The Four Stroke Dirt Bike Engine Building Handbook. In it you will find over 300 pages of technical knowledge to help you get off on the right foot when rebuilding! - Paul   Amazon DIYMotoFix.com  
    Posted by Paul Olesen on Feb 08, 2017

    Interview with Jeff Emig
    The sport of motorcycling is fun and rewarding for the entire family, but done incorrectly can lead to significant and life altering consequences.  When I first heard about the formation of the USMCA I felt a sense of relief that others shared my views on education, including appropriate training.  As it stands now new riders must rely on friends and family to teach them the ropes of basic riding.  Unfortunately due to the growth of our sport if you want to ride but do not know other riders,  your education is trial by fire. The USMCA has a plan to transform the educational/safety piece of riding and help reshape the long term health of our two wheeled passion.  I took a few minutes to speak with one of the founding members, multi time Supercross and Motocross National champion Jeff Emig, to answer a few questions. CC: Regarding the upcoming Summit on February 9th and 10th in Arlington, TX, can you elaborate on what an individual who is attending can expect?  Jeff:  This being the first annual coaching summit, and the fact that we have not reached the point where we are certifying coaches with everything up and running, this  first summit is going to be about the introduction.  It will be about what the USMCA is what the goals are and how we are going to get there.  The initial summit is about the journey that got us to this point where we need to make a change in the industry and why coaching is necessary, then laying out  the plan for the next few months and year. CC: Is there a base education needed for anyone to attend?   Jeff: No.  Anyone can attend. CC: How will an established coach benefit from the USMCA? Jeff: Some of the biggest names in the industry will be there and every current coach we have spoken to has been extremely positive.  When it comes to their business the USMCA should provide a tremendous value to them and be a tool for them to run a better more successful business than what they already do.  Not to mention they can look at it from a totally different perspective of the responsibility and opportunity to give back to the sport that we have all been involved with.  We feel like we are on to something really good, we have had great feedback up to this point.  The summit is a big event, there is a lot riding on it for everyone that's been involved.  I feel confident that we have some really smart passionate people that have helped build the USMCA  to this point.  Beyond the summit is when we start to get all of the coaches in the industry involved and building standards and practices for their coaching association, there's more work to be done.  This is one more step toward making it to the mountain top and reaching our goal. CC: What is the primary focus of USMCA?  (At this point Jeff referred me to the USMCA Mission Statement). Jeff: The USMCA Mission Statement: The USMCA is a nonprofit corporation founded to oversee and foster the creation of a robust, nationwide network of motorcycle-riding coaches in the sport’s major disciplines, including on-road and off-road riding.  Structured, systematic program curricula will ensure that the training if these coaches is as effective and safe as possible, and will enable them to subsequently share their own knowledge and skills with both new and exisiting motorcyclists through a highly consistent and repeatable process.  As a result, parents and individuals seeking coaching will be confident that they can choose from a wide selection of well-trained, certified coaches. CC: What are the long term goals of USMCA and how do you think these goals will shape the future of the industry? Jeff: To break down the barriers to entry helping beginner and novice level riders advance their skills so they can be lifelong enthusiasts. CC: Thanks Jeff for taking the time to explain USMCA.  I look forward to helping grow the Motorsports community as we are in need of a structured curriculum to educate riders on techniques that not only make them faster but keep them safe.  Is there anything else you want to add? Jeff: At this point we are getting close to maximum capacity and the support from the industry as a whole that we have received has been a bit overwhelming.  The USMCA is not about the founding members, advisory board, or team.  It is about the industry and it's about the coaches, and more importantly our customers in the sport of motorcycling.  It's not the only answer to producing a great future for our industry but we certainly feel that with all of the data and information that we have collected and the hundreds of hours of meetings and time that  we have all put together, establishing the USMCA is one of the things that will build a better future for the sport as a whole.
    Posted by Chris Cooksey on Feb 07, 2017

  • Popular Now