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  • Featured Content

    DIY Piston Ring Compressor
    Today I want to share a quick tip with those of you who are working on your own engines but just can’t justify buying a set of piston ring compressors. It’s entirely possible to make a perfectly good ring compressor from materials you can get at the hardware store. All you need is some plumber’s pipe hanging tape and a hose clamp that is sized according to your cylinder bore. To construct a DIY ring compressor from plumber's pipe hanger tape you will need to determine the length of tape required. This is easily done using the following equation for calculating the circumference of a circle. Length of Tape Required = Piston Diameter x π (Pi) When the tape is wrapped around the piston tightly, the final length may need to be reduced slightly so that the ends don’t butt together. Once the tape has been cut to length, make sure whichever side of the tape will be contacting the rings is smooth and free of little plastic burrs that could catch the rings. Simply lube up the tape, tighten down the hose clamp, and you are in business. Do you have a tip that makes compressing rings easier or cheaper? If so, leave a comment below! - Paul If you enjoyed this tip and want access to more like it, check out my book, The Four Stroke Dirt Bike Engine Building Handbook. On the fence about the book? Check out what other riders are saying: Thumper Talk Review Available at: Amazon.com DIYMotoFix.com
    Posted by Paul Olesen on Feb 25, 2017

    Round 8 Atlanta: Dungey’s Revenge!
    Round 8 Atlanta: Dungey’s Revenge! The past week was full of message boards and journalists (myself included) asking, “What's wrong with Dungey?”  He came to Atlanta ready to silence his critics.  I stand by my analysis that he is battling an illness, but clearly he is getting better.  Dungey did look fatigued towards the end of the race as opposed to Eli Tomac who remained fresh.  With that said, Dungey got it done and this is what defines him as a Champion!  He can seemingly raise his level when needed while taking what's given on other days.  Marvin and Eli have to be frustrated, both guys were faster than Dungey all day, including the Main event but bad starts caused both guys to struggle.   The Atlanta track wasn't ideal for passing and the sand section was downright silly.  Why put beach sand on the backside of a wall jump?  I like the sand sections when built in turns.  Wall jumps without sand cause guys to get blasted with dirt, again putting sand there was ridiculous.  Another part of the track I didn't like was the dog leg before the triple.  Maybe they had to build it that way to fit the stadium, but in any form of racing a dog leg creates single file racing unless it is followed by a double apex 180 degree turn.   In the 250 race, Zach Osborne finally reached the top step of the podium!  Osborne took the long road to the top.  For those who don't know his story, here is the short version.  Osborne was highly touted coming out of the Amateur ranks signing with Factory KTM.  This didn't work out and he ended up earning the dubious nick name “snack pack,” the name given to him from outdoor national commentator at the time David Pingree.  After losing his ride at KTM the only option to continue his career was to take a ride in Europe.  Osborne fought hard and earned himself a ride with Geico Honda but after a couple years of not reaching his potential they let him go.  Zach then signed with the Rockstar Husky team.  While last year was filled with disappointments, this year is proving different.  Almost 10 years after becoming a Pro he earned his first SX win.  Osborne took the hard road showing through dedication his old nickname, “snack pack” was lifetimes ago.  I put him as the East title favorite, but this coming week will be telling.  Is this going to make him want to win every race, or is this just the monkey off his back?  I am predicting the competition is in trouble. Alex Martin and Jordan Smith seemed a lock for 2nd and 3rd in the 250 main until Martin cleaned out his teammate.  Smith missed the on/off jump and was out of the normal rhythm, still Martin shouldn't have jumped in there and cleaned him out.  It makes senses if they were battling for a win, but when both TLD KTM riders are in podium spots with little or no chance to catch Osborne, it becomes a stupid move.  Team manager Tyler Keefe has to be pulling his hair out. Although Dungey’s performance was great, it's a 17 race series!  Tomac and Musquin can't allow Dungey any more breathing room.  Let's be real though, if Dungey is up more than 30 points after Daytona this is likely over.  
    Posted by Chris Cooksey on Feb 26, 2017

    The all-new ThumperTalk.com lives! Many seem to like it, a few absolutely hate it, and most seem to have taken the changes in stride. The typical forum stuff is all there, even if some things function a bit differently than you might be used to. Regardless, I thought that it might be helpful to point out some of the more useful and/or interesting features of the new site. In no particular order: #1 ADDING IMAGES TO YOUR POSTS You've always been able to attach an image by browsing your device's hard drive, but now you can do the same via drag-n-drop. Also, to the right of the post editor box, you'll see a menu item called, "Insert other media". This will allow you to attach an image from a URL or from your library of images that you've uploaded previously (think TT cloud). Also, once an image is embedded in your post, no more thumbnails! Images scale to fit best on the size of screen your viewing on. Bigger screens see bigger images and smaller screens.... I'm sure you get it. #2 CUSTOM ACTIVITY STREAMS ThumperTalk has more topics than you can shake a stick at and let's face it, you're not interested in even half of them. You likely already know that you can filter by topics you started, posted in, or simply subscribed to. But, now you can build your own custom activity streams that zero in on just the stuff you care most about. Each stream can be given a name meaningful to you and you can create as many streams as you'd like. Custom activity streams are found under the "Activity" link in the main sit nav. #3 Member Mentions If you play on Instagram or Facebook, you probably know that you can let specific users know about what you've shared by mentioning them in your post. We now support mentions, but for those of you that are not quite sure this works, simply type @username anywhere in your post. As you type, we'll show you a list of the matching user name(s) to select from. When done, your post will look like that below. Note: those you mention will only be notified if their accounts settings allow it. #4 More Flexible Search The new search function is now able to search all site content, not just specific sections, such as forum topics. So, say you're looking for info on what other riders think of a particular tire. Searching "All Content" will pull in anything relevant from forum discussion topics, product reviews, articles, member garages, etc... After you click into the search box, click the down arrow to reveal the search options. #5 Quick Create Menu No longer do you have to navigate to a particular part of the website to start a new discussion topic, submit an article or product review, or to update your status.  Just click the  +Create link next to your notifications icon: #6 Topic Preview on Mouse-over To preview a topic without opening (from desktop), simply put your mouse pointer on the topic title and give it a sec... The preview will allow you to see the first post, last post, and to mark the topic as read. How do you close the preview? Just navigate away. It will close on its own. #7 Profile Page Cover Photo Want your profile page to look sexy like mine? Now you can upload a custom cover page photo to make it your own. #8 Following Other Members Want be notified of when an always helpful, knowledgeable member posts stuff? Now you can follow them. Pretty cool right, or kinda creepy depending upon how you look at it.  How to follow someone? Nav to the member's profile page and click "Follow Member".
    Posted by Bryan Bosch on Feb 07, 2017

    Klim F3 Helmet ECE/DOT
    When riding slower, technical wooded trails, I can overheat quickly without gear that vents well, especially when it comes to helmets.    Most helmets are designed to vent at varying levels, but most are only effective with some speed. Based on the positive experience with my well-worn first generation Klim F4 helmet   , I wanted to see if they had genuinely improved it with the F3. Among other things,  the F3 now boasts a whopping 13 intake vents, 6 exhaust    vents, and field of vision has been nicely improved. Sounds great to me! In an effort to keep weight down, the Klim F3 is roughly 10% smaller that typical lids, but it continues to meet (or exceed) ECE and DOT safety approvals due in part to Klim's "Structure Mapped Composite base material lay up". Not only do lighter helmets reduce rider neck fatigue, it's less moving mass in a crash. So, smaller surely doesn't necessarily mean a compromise in rider safety. It's also designed with popular neck braces in mind (I wear an EVS Sports RK4). My initial impression of the Klim F3 was that it looked like a quality piece, both well put together and finished. Klim sent one finished in matte black and I was pleasantly surprised that it didn't look cheesy like some others I've seen with the same finish. Hopefully the black won't soak up summer heat! The F3 comes with a handy   storage bag, an insert that covers your nose and mouth for riding in cold weather, extra visor hardware, but disappointingly, no spare visor. To test the Klim F3, I headed to Walker Valley ORV in NW Washington State. I knew that this time of year would be a good test because of snow. Now, you'd think snowy weather would be cheating for a helmet that already claims to have great ventilation, but since the riding was slow and technical, and I had to frequently get my bike unstuck or pick it up out of the snow and ice, I worked up a whole lotta' body heat! And while the bike may have been steaming, my head remained relatively cool. Pretty darn good for slow speed, very physical conditions. To test the F3's air flow at speed, I dropped down in elevation and rode some of the easy trails and ripped a few high speed gravel roads. Yep, she vents... to the point where my head was cold. No question that the F3 outflows the F4 and that's saying something because the F4 worked what I thought to be incredibly well. There is no way to throttle or close off the vents, so depending upon your comfort level, an under helmet beanie might be in order in very cold conditions. I did spend a day taking a rider safety course where it was a downpour the entire time. At no point did I see or feel any water seeping in through the vents. That's a major plus! Did Klim improve the rider's field of vision with the F3? Absolutely, both with and without goggles. I'd say the FOV is incredible. It's amazing what you can see out of the corner of your eye. No more surprise mountain lion and/or bear attacks!  Helmet Eye port Comparison F4: 8.25" W by 3.5" H* F3: 9" W by 4.25" H* *From top of nose piece to upper part of eye port Is the F3 comfortable? Yep. No discomfort or pressure points from the cheek pads, liner (both feature "adaptive smart foam"), or chin strap. And, it's light enough that I didn't feel the need to take it off after a difficult trail. The F3 weights in at 3lbs. 3oz., nearly a half a pound lighter than my old F4. Lastly, no interference or conflicts with my EVS   neck brace. Since my initial test rides where I got nice and sweaty, I've sent the cheek pads through the washing machine with my other gear. They are easy to remove and snap neatly back into place with no hassle. The helmet liner is made from anti-microbial/bacterial fast-wicking textiles, so it should stay relatively stink/cootie free with periodic cleaning. My overall opinion of the Klim F3 helmet is high. This helmet did not disappoint me; it breathes incredibly well, you can see everything, it's super light, and quite comfortable. I repeatedly got the bike hot, but my head never suffered the same problem. For the tight, technical stuff, you gain a great advantage with being able to see what your next obstacle will be. And, it's also very reasonably priced for a premium helmet at $299.00 USD. If you get uncomfortably hot while riding, I'd definitely checkout the Klim F3.
    Posted by Bryan Bosch on Feb 23, 2017

    Product Spotlight: Alpinestars Tech 7 Boots
    Product Spotlight: Alpinestars Tech 7 Boots These days expensive protective equipment saturate the market, but Alpinestars has a motocross boot that offers high dollar protection with high end quality at the average man’s price.  I have worn the Sidi Crossfire 2, Garne SG-10, SG-12, and Alpinestars Tech 10 boots.  While these top-line boots all share impressive features my favorite is the Alpinestars Tech 7, with the low retail price of $349.  Once Western Power Sports became a distributor for Alpinestars I immediately tested the Tech 10 against the Tech 7 boots.   My initial thought was I would prefer the highest priced boot, the Tech 10.  While this boot is amazing, I felt like I could literally jump off the roof and have no ankle injuries (not recommended), I struggled with the lack of flexibility.  I am 6’4” and have suffered many foot and ankle injuries throughout the years, the most recent was a ruptured Achilles’ tendon.  I tend to look for boots that offer support and protection, yet allow me the freedom to ride comfortably and the Tech 7 meets this criteria.  If I was riding AMA Supercross I would opt for the Tech 10, but for me and my Vet B riding level the Tech 7 is heaven on my feet!  Look for both the Tech 7 and Tech 10 boots available in the TT store.   https://www.thumpertalk.com/shop/cart.php?m=search_results&c=&catID=4443&v=&id=&venID=&attrList=&manuf=1602&priceFilter=&sortBy=PriceHiLo&search=Tech+7&sort=5&asc=desc&page=2 KEY FEATURES • New dual compound sole is seamlessly integrated into the base structure for superior durability and features high performing rubber grip patterning and enhanced feel. The sole and footpeg insert are replaceable. • The anatomically profiled shin plate features a dual closure system with an internal microfiber flap attached with Velcro® for a precise fit closure while the rugged and durable shin plate attached securely with a precision adjustable buckle. • Wide entry aperture for convenience and allows broad ranging calf fit adjustment and support. • Innovative buckle closure system includes high-impact aluminium bridge closures, with memory settings and a quick release/locking system with self-aligning design for easy, precise closure and improved riding performance. All buckles are replaceable. • Redesigned instep and Achilles accordion flex zones construction for superior comfort, control and support. • Extended microfiber gaiter helps prevent excessive water and dirt entry. • Internal lining includes anti-slip microfiber suede on the heel to help keep foot in position.
    Posted by Chris Cooksey on Feb 21, 2017

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