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AHRMA17L

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Everything posted by AHRMA17L

  1. It has been almost exactly a year since we last did this...any news on whether another BD Group buy will be happening? I need a few kits!
  2. AHRMA17L

    DR350 Swigarm Flex

    I searched the forums and couldn't find a good answer for this. I have two DR350s (off road models converted to dual sport) that I have for "spare" bikes, but in all honesty, I ride them more than my rece prepped XR400R and XR650R. I have always thought the DR350 was an underrated bike, and in some facets is superior to the XR400 (six speed transmission, carburetor). However, the handling has a little to be desired, mainly the flex in the chassis which I attribute to the flexy swing arm. I never gave much credit to the flexy swingarm claim, but compared to the box section swingarms of the XR's you can actually make the DR arm flex by grabbing the rear wheel and pushing to the left and right. The kicker, though was that I had a chance to ride a DR with the $500 Scott's swingarm and the difference was quite noticable. The best way I can describe it is that the rear of the bike no longer felt like all the spokes were loose or that it squirmed around like it had a flat tire. It was that apparent. Anyway, I can't really justify spending $500 on bikes that are worth $1500, otherwise I can just sell them and buy XRs. So, has anyone had their DR350 Swingarm reinforced by Thumper Racing or know of any other companies that offer the swingarm bracing service? If so, was it worth it? Some have suggested to replace the DR swingarm with one from an RM or RMX, and I would love to do that as I have access to just about any of those parts I want, but all of the mock-ups I have done completely screw up the geometry of the bike, as the locations of the links and pivot points are not even remotely similar or close. Yes, various RM/RMX swingarms and linkages will bolt into place with 6mm spacer/shim on the right side of the swingarm between the frame, but no combination of shocks or links create anything that is not some sort of frankenbike. Thanks guys!
  3. I have decided to go the inverted fork route on my 2002 XR400. I have purchased a complete front fork, wheel, and brake setup from a 2006 CRF250R--every piece is brand new, it was taken off a brand new bike--the entire front end. I have also purchased the Emig Racing XR400/CR conversion fork stem and shim. So...the question is what triple clamps, or at least lower clamp, are best to use in the conversion. The stock clamps are cast and I do not think they would be very good to work with in terms of grinding off the steering stops and perhaps "pocketing" the clamps for new steering stops. If the stock clamps will work, I would just as soon use them for the stock OEM appearance, but I would like to know before I waste time on removing the steering stops and pressing in the stem and bearing. What clamps have you guys used in your conversion and how did the work. i want to know the smallest details, i.e. oil cooler clearance problems, number plate or headlight mounting issue or substitutions. I am not doing this on the cheap, I want something that rivals OEM Honda or factory in terms of the finished product. Let me hear your issues, problems, successes, tips and advice. I would appreciate as much detail as possible.
  4. AHRMA17L

    XR400SM coming in March??

    I found this over in the dual sport forum... This is the first time I have heard of this bike coming to the US. Personally, I do not think it is true. Anyone have any info on this actually coming to the US?
  5. I have done a number of fork conversions/upgrades to various bikes over the years. Some have turned out great (DR350 with DR-Z400 clamps and shortened 1996 RM250 forks) and some have turned a good bike into an ill handling Frankenbike (XR400 with 2006 CRF250R forks). Here’s the project: I have a spotless 1990 YZ250WR with no more than 50 hours on it since new. For a number of reasons, I don’t want to sell it and upgrade to a later YZ (I also have a 1999 YZ125 and a 2001 YZ250). I had the shock revalved by Noleen since Clark Jones probably know more about the early 1990’s YZ’s than anyone else. The shock works great! The forks on the YZ250WR…this was the second year for the inverted fork, and it is a rather poor design with lots of stiction, harsh on the little stuff, prone to seal leakage and contamination, etc. The idea is to install a spare set of 2000 or 2001 YZ250 forks on the 1990 YZ250WR. I am not worried about fork performance, but rather geometry/handling concerns. There appears to only be about 1/8” difference between the top of the fork tube and the centerline of the axle, so ride heaight will be OK. Also OK will be the use of the later stem although I’ll have to use the lower bearing from the later bike. The 1998-2003 tripleclamp will then mount right up. THE QUESTIONS: Does anyone know the actual offset of the 1990 clamp or whether the offset is the same as the 1998-2003 YZ250 clamp? The other question is axle dropout distance, which affects trail. Does anyone know the dropout distance from the centerline of the fork to the centerline of the axle for the 1990 YZ and for the 1998-2003 bikes? Thanks!
  6. AHRMA17L

    XR600R Choke plate

    Everyone knows about the XR600R choke plate problem. I have had a number of 600s over the years and have always replaced the choke plate with A Scott's, XR's Only, or Precision Concepts aluminum chokeplate. Has anyone tried removing the spring loaded flapper valve and simply using the stock stainless choke plate without it? The open area is about 2.5 times as large as the two holes in the billet aluminum plate, but the air passages at the bottom of the intake bell are still blocked off. The bikes will be stock except for a 68 pilot jet, an uncorked stock muffles, and the baffle taken out of the airbox.
  7. AHRMA17L

    Bike Updates from Weatherman, B of LA and LA PAZ via BAJA PITs

    Any news on 305X, Ace Nielson and crew?
  8. I have searched here on Thumper talk for a definative answer and can't find it. The question is whether wheels from a 1996 and newer XR600R will directly swap with XR400 wheels. I checked the Honda part numbers and they are different, but the wheels/hubs, etc. look identical. The bearings are the same for the front. One of the bearings in the rear has a different inside diameter, but the outer diameter and width are the same indicating to me that perhaps it is a spacer difference and not a hub dimension difference. I am looking for a spare set of wheels for my XR400 and have found a 1996 XR600 that is being parted out with a good set of wheels, but of course I have to have them shipped and can't simply try them myself. Thanks once again, guys!
  9. Thanks for the heads up--I'll check to make sure.
  10. AHRMA17L

    1978 YZ 400, just bought. Need info!

    Actually, parts are easy to find for the 78 and earlier YZ400 due to it having the same engine design rooted in 1975. The 1979 “F” model is essentially a one year design and entirely different engine platform. The 1979 is rather hard to find parts for. Most of everything can still be purchased through any Yamaha dealer. If there is something you cannot find, call Speed and Sport in Bloomsberg, PA, or go to their website and www.yamatopdog.com. You can also go to www.vintagemx.us to the swapmeet, check www.AHRMA.org for guys that ride the Yamahas. You can find Genuine Yamaha owners and shop manuals on eBay. I may even have an owner's manual for the your "E" model. There are a lot of websites that specifically focus on the evolution YZ’s.
  11. AHRMA17L

    KYB Shock lockup

    Excellent deductive reasoning through experience! It doesn't get any better than that. Thanks for the insight.
  12. I have seached the threads over the last couple of days and can't seem to find a definitive answer... I have a bone stock 2003 YZ250. Will the 2006 and later SSS forks slide into my existing triple clamps? I realize that there are a number of minor issues (fork lug thickness, 1-2 mm axle spacer width, brake line routing) but I am not concerned about these things. I only want to know whether the forks will slide into the triples, or whether I would need to use a later triple clamp, and if so, what year? Thanks!
  13. AHRMA17L

    SSS Forks slide into 2003 YZ250 Triple Clamps??

    Thanks, I appreciate it guys. The decision was to swap to the SSS forks or to have the existing forks revalved with the Smart Performance Dell Taco kit. I think I’ll just stay with the 2003 forks and go with the Smart Performance revalve. Then again, perhaps the 2004 triple will work, since the aluminum fram triple would require steering stop modification to the frame.
  14. AHRMA17L

    KYB Shock lockup

    I realize it is not a KYB, but I had the same exact think happen to both an XR400 and an XR600 I had. The shock on the 600 would work fine when cold, but as soon as it got warm, it would nearly seize to the point of taking 5 seconds for it to rebound. The 400 was "tight" all the time. People told me the same thing (linkage binding, swingarm pivot problem, etc.). I was riding with Tim Morton who had had a lot of XR400s in his fleet, and while he said that it it not common, the piston will sometimes sieze in the Showa shock on the XR400 and 600 (nearly the same shock design). So started the process of elimination. Cleaned and polished the rebound needle. Replaced the seal head/bushing. Still had problems. Replaced the piston/valving stack with a Race Tech Gold Valve. Problem eliminated in both shocks.
  15. AHRMA17L

    Shock Revalve Stack for '90- XR250?

    I have a number of XR600R shocks--some stock, some with Race Tech Gold Valves, and one very special hard anodized shock built for Baja Designs but never used. Are you thinking that it is possible to use the 1991-2000 XR600 shock on the 1986-1995 series XR250?
  16. I stumbled across a low hour 1996 RM250 last weekend for dirt cheap. It has been sitting inside the original owner's shop for the better part of 12 years The catch??? About a year after he bought it, it fell off of his trailer, and the frame is somewhat tweaked behind the steering head--so I need a frame. Anyone have or know where there is a decent to excellent 1996-1997 RM250 frame?
  17. AHRMA17L

    Wheel bearings you used to use

    The Pivot Works Kits are Chinese--that's why they are cheap. Just go down to your local bearing house with the correct numbers and buy good American, Japanese or German bearings for a fraction of OEM cost.
  18. AHRMA17L

    Bought a lemon!!

    I have a 2000 XR600 with about 150 original miles on it--literally like new. I's sell the engine alone (all electronics, kickstart and shift lever, but no carburetor) for $1750. Whole bike, street licensed and ready to go for $2800. I have a 1988 XR600 with about 1500 miles since new that I'd sell the engine alone (same as above) for $1250. Whole bike ready to go, street licensed for $1995. Both are near perfect, have lots of accessories and need absolutely nothing.
  19. Does anyone have the table or a print out for any of the Gold Valve shim stack settings or combinations for the 1991-2000 XR600R shock? I realize that Race Tech claims there are over 300,000 different combinations, but some base settings for a 170lb fast intermediate/mid-pack expert rider for desert or Baja use would be good. Here's the problem...I have three XR600 shocks, all with Gold Valves, which needed either rebuilding or simple repair (i.e. shock bumper gone), so I've taken each apart. I do not know the history on any of them or what typer of rider/riding they are set up for. All are Gold Valve equipped, but the shim stacks vary wildly. Any help would be appreciated. Thanks!
  20. AHRMA17L

    XR600 Race Tech Gold Valve Settings

    You are right...rebuilding a shock is very simple if one is patient enough to follow the steps. If everone only knew that two snap rings hold the whole thing together, everyone would service their own shock!
  21. AHRMA17L

    XR600 Race Tech Gold Valve Settings

    You are right...rebuilding a shock is very simple if one is patient enough to follow the steps. If everone only knew that two snap rings hold the whole thing together, everyone would servence their own shock!
  22. I disagree...just order Honda parts from Sevice Honda (there's one other great place I can't think of right now) and your Suzuki and Kawasaki parts from Midwest Action Cycle. Less than a week to you door and far cheaper, too. You don't even have to take a trip to you local "friendly" dealer.
  23. AHRMA17L

    XR600R Choke plate

    Here's what mine looks like. I have not taken the 1988 XR600 apart yet, but all of the other 600s I've owned and all of my XR400s have this steel choke plate, not the cast item as pictured elsewhere in this thread. The steel of the choke plate is fairly thick and doen't look like it would be prone to breakage (the flapper valve and spring is very flimsy, and looks like a disaster waiting to happen).
  24. AHRMA17L

    XR600R Choke plate

    Ah...I thought it was stainless. I've never given them much thought, since I had always replace the whole unit and tossed the original.
  25. AHRMA17L

    Thinking about moving to Oregon

    Odd, the metal tank is not even a requirement...and the DMV is unable to show that this is a requirement. Even more odd is that Oregon has absolutely no equipment inspection requirements that require verification of a metal tank. The proof is in what's out there. KTM and Husky dualsports have plastic tanks, as do a number of scooters, and Ford pickup trucks. Emissions via VIN, maybe. Metal tank as a reason for denial, no. Unfortunate that someone at the DMV is making up rules.
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