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Found 102 results

  1. MentalGuru

    Big Bore Kits

    I was reading Ramz site and noticed he has the first 283cc big bore kit that was produced. He mentions a larger kit is in the works too. I'm guessing since the head isn't shown in the big bore pictures that it is getting ported too... Then he posts picture of 2 packages that look like new cams... He has something special up his sleeve.... Details would be great. Thanks
  2. I have a 2013 DRZ 3x3 MRD/SSW 39FCR Hot Cams stage 1 in/exh What should I expect when I do the big bore? Is it going to be a WOW change? Or just another incremental change? I would imagine a lot more TQ in the low end and mid range? How much of a higher RPM difference? Basically overall, is this going to be a change that transforms the bike the way the exhaust/carb did?
  3. Rickwood23

    Cylinder works BIG BORE kits?

    Hey just wondering if anyone has any experience with this and if they are somthing to stay away from? They look very inviting on ebay and for the price....
  4. AJBFire

    Honda CRF250R (2008)


    It has been a good bike to won for me. Plenty of power stock. I did add a big bore kit to it for this year so we shall see how that benefits.
  5. jbranford

    Suzuki DR-Z400 (2002)


    Great fun, owned for 7 years and very few problems
  6. Ruben Ruben

    Suzuki DR-Z400S (2002)


    very reliable,good fuel consumption.not very good suspension and brakes. good all arround bike but nothing special
  7. DreDay

    Suzuki DR-Z400SM (2008)


    Freshly built 440SM.
  8. sparky620

    KTM 250 XCF-W (2009)


    Great bike it's not a track bike but on the trails she can't be beat.
  9. 4 reviews

    Bolt on and go The largest displacement bore kit available without the need to bore engine cases Kit includes aluminum plated cylinder, BBR motocross-grind camshaft, piston kit and gasket Add 26mm carb kit for the best performance gains
  10. I've seen this topic pop up a few times, so I thought I would share my findings. Just over 12 months ago I finished off my 440-kitted XR400 that was fitted with brand-new Kibblewhite valve springs, titanium retainers, Wiseco/Hot-rods 400EX crankshaft (love the electric start!), Kibblewhite black diamond valves (standard size) and a stage 3 Hotcam. I used a 4-play 440 kit from eBay that came with a pre-bored cylinder, a Wiseco 11:1 89mm piston and a Cometic gasket set. I had the head reconditioned and fitted with new stem seals and springs at my local machine shop. The head had a very slight mark from the head gasket firing ring so it was skimmed 5 thou, media blasted to clean it up, valve seats recut and then reassembled. Aside from this I did the rest of the assembly myself on my bench, following the workshop manual instructions for setting up the stud heights in the cylinder. I reused my old studs and rockers on the new assembly. I then got the motor running, eventually swapped over to a Mikuni BSR42 and took it out hard trail riding and commuting on the bike as my sole transport for the last 12 months. I have clocked up 260 hours/12,000km on the XR in that time, doing anything from very tight trails banging the bars off trees to hours on end sitting at 110-115km/h (70mph). I average about 5L per 100km (47mpg) with mixed riding as a commuter. In that time the bike was severely overheated once on the trail from hell (we managed 2km in 4 hours), to the point where the oil started to burn and smoke out the breather. It was quite down on compression after that, it turns out it had a partially blown head gasket. It still pulled very hard though! Which brings us to now. These photos are after the head and piston went back into the machine shop for a clean up. Unfortunately I don't have any before pictures due to time constraints except the first one (I am in the process of moving whilst rebuilding the XR). The piston has had a light buff on a wire wheel to remove carbon, the head has been stripped, valve seats recut (they were showing wear - to be expected after 260 hours of use. Especially considering it spent a lot of time >8000rpm!), new stem seals fitted and bead blasted once again. The bore has been honed and was found to be 2 thou out of round. This is somewhat to be expected given how severely it was overheated. Total cost to bring this motor back up to spec was $250AUD including all machine work & a set of rings and it's ready to go for it's next big trip - a 20,000km trip around Australia If anyone has any questions regarding building a 440, the electric start conversion or otherwise I'll be happy to help. I'll hopefully have some photos & video of the bike up soon once it has been edited. Night and day difference between a stock XR! Camshaft is showing a little discolouration but has no scoring or gouges that can be felt by hand - I was expecting more wear than this. 260 hour old piston. Broken in hard! Note: Piston has had a clean before this photo but the skirts are un-touched. Top of the piston after a quick de-carbon. It will be replaced at next tear down. Piston has some marks from blow-by past the rings but isn't showing any signs of fracturing or scoring. Reassembled for round two Head cleaned up and ready to refit. I have no idea why one of the valves is a different colour either - it's how I got them from Kibblewhite. So there you have it - 12,000km/260 hours in 12 months. $250AUD and it's ready to rock again. Aside from replacing 2 sets of friction plates I have not had to touch the motor aside from normal maintenance.
  11. em8691

    Suzuki DR-Z400S (2003)


    This bike has come along way from the stock POS Suzuki puts out, but really a solid mild bike turned into a ROCK SOLID fire breathing monster! I'm sure that I left some stuff out but it's been fun transforming this bike into something that I'm proud to own, and a big THANK YOU to all here at THUMPERTALK for helping me make this bike happen! Eric ps...MORE pics to come Of course I listed all my mods without using the "add mod" option. SHOOT!!! too late now, well here they are... CW 434 big bore Hot Cams Stage 2 intake and exhaust E header pipe w/ FMF Q exhaust FCR MX 39 carb ThumperTalk MCCT Free powre mod Shoria LFX14A2-BS12 battery (210 CCA!) Kickstart (just because) ThumperTalk Case covers (before they were "branded") IMS +1 shift lever dr650 clutch arm lever(shorter cable pull) IMS pro SS foot pegs Clarke 3.9 neutral tank Pingel petcock SSW short pull throttle tube w/ single cable ProTaper Pastrana FMX 1 1/8 bars w/ pillow top grips Zeta triple clamp w/tall risers Cycra probend handgaurds w/ Zeta inter-grated turn signals Acerbis Cyclops headlight Acerbis plasticsPoli-Sport plastics WER steering stabilizer Happy Trail skid plate Race Tech Gold valves GR-2 Race Tech .54 fork springs Race Tech 6.0 shock spring Topar rear disc guard KTM fork guard mod Galfer SS front and rear brake lines Galfer front wave rotor (18" 21" set up) Shinko Golden Boy 244 DOT trail tires (18" 21" set up) Michelin HD tubes Warp 9 SM wheel set w/ Conti force SM 120/70/17 150/70/17 Kytech bilet rear rack Happy Trail pannier racks Pazoma levers Unibiker radiator guards Silicone radiator hoses Pivot Works wheel bearings Pivot works suspension bearings Seal Savers fork portectors DRC edge tail light flush mount rear turn signals
  12. Larry02ACR

    Kawasaki KX250 (2004)


    I think this motorcycle is awesome. Of course, I pretty much think all motorcycles are awesome.
  13. josh_45

    Honda XR650L (1993)


    93 XR650L, very fun to ride, big bore kit, aftermarket exhaust, oversize plastc tank, and aftermarket tuned suspension
  14. DrzMotarded

    Suzuki DR-Z400SM (2005)


    2001 Suzuki Dr-z400s converted sm with 2005 sm swingarm, shock, triple tree and forks, speedometer gear, wheels, rear brake disc<br />Oversized front brake disc <br />Venhill Stainless steel braided brake lines <br />Cylinder Works Big Bore 434 Kit w/ E base gasket. <br />Yoshimura Rs3 Full Exhaust <br />FCR39mx Carb w/short choke & R&D Flex Jet Fuel Screw <br />160MJ45PJ65 starter jet PAJ removed,O ring Mod<br />IMS 3.2 gallon fuel tank w/Dr-z400e petcock <br />Acerbis Cyclone Headlight<br />DRC Edge2 Tailight <br />DRC Wide Footpegs <br />Pro Taper Countour Overzised Bars<br />Bitech Manual Cam Chain Tensioner <br />Turkey Baster Mod <br />Clutch switch mod <br />Kickstand sensor removed<br />Shifter lever filed <br />Rear USB port with on/off switch for<br />phone, GoPro, other device charging
  15. Teer Drop

    Suzuki DR-Z400SM (2014)


    Modifications: Cylinder Works 434cc with Vertex Piston installed by Carlo Gagliardo (Carolina Cycle Service) Refurbished head port and polish at 6,000 miles. FCR 39mm, Stage 2 Hot Cams, MRD Z Pro Full Exhaust, Tokyo Mods MCCT, EBC Clutch, 3x3 air box mod, Electric Fan/Switch, Steel Braided Brake Lines, EBC Brake Pads, DRC Taillight, Short Super Moto Front Fender, Zeta Top Triple Clamp and Stabilizer, Zeta Levers, Zeta Bling (gas cap, tire caps, oil drain bolt, dipstick, engine bolts, engine covers) DRC Blue Bolts, Z Carbon Fiber Guards) Tires: Pirelli Diablo Rosso IIs.

    Yamaha YZ250F (2003)


    Nice manageable power, fun trail bike, and easier to start than a 450!!
  17. 2StrokeCruiser

    Top end rebuild issue

    Hi all, so I finally got my 97 rm250 up and running, and got a title from my local pd and dmv for it. The bike was pretty rough when i got it, but I've done allot of work to it and it is on pretty good shape now. Things were going too well... So i got the cylinder re-sleeved to stock specs, new stock bore pistion rings ect. I completely took the powervalve out, cleaned the assy and fixed a few broken bits. Cleaned the carb, checked my jets, float, needle. Everything was great. Sounds good right? So I put it all back together and fire it up. It took about 10 kicks to get started, which I did completely drain the carb so i would expect it too. I had the rad cap off so i could watch my fluid and be sure all was good, after about 1 minute of it idling i shut it down, and put my cap back on. Tried firing it back up and it wasnt having any of it. About 30 kicks, it was just blowing gas out of the carb lines. Check compression, still good, so i pulled the header off to take a look into the cylinder, no signs of blowback, but it was as wet as a river in there! Clearly premix not crank oil . So i pulled my carb off and checked it out, drained the floats and inspected needle, float and jets. Put it back on aaaand still nothing. I'm at a loss here, any help? As a side note, It has fresh 91 oct. 32:1 premix, it was jetted for it anyway, the reeds were good, I inspected them well. Fresh plug, (its just a Ngk from napa, but my manual says it takes a $60 platinum plug???) compression is good, seals are all good, EVERYTHING was torqued and set to clymer spec, I have a good snap-on torque wrench that i had tested for accuracy before using on this project, it was .6 of a ft.lb off spec, so not an issue. All crushwashers were replaced. I'm at wits end here, I've done one heat cycle, I'm gonna go do the second any help would be appreciated.
  18. 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.
  19. wilaircraft

    Big bore and hot cams

    Anybody notice additional engine nose after installing a big bore kit and hot cams. Maybe more of a ticking sound at idle? Wilaircraft