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brianjonesphoto

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About brianjonesphoto

  • Rank
    New Member

Previous Fields

  • Bike
    2005 Montesa 4RT

Profile Information

  • Location
    Marysville, WA
  • Gender
    Male
  1. Since it the only month our trials club takes off I’m diving into some much delayed maintenance. I pulled the rear end apart and serviced the linkage and swing arm bearings they are in good shape for being ignored for 3 years and don’t need replacing for now. I going to have my Showa shock serviced my a local suspension tuner with lots of dirt bike experience but this is his first trials shock. Upon external examination he is pretty confident it won’t be too different from a Showa dirtbike shock. I’m only having him service the shock with new seals and oil. It’s 15 years old and likely has never been serviced. One thing I cannot find a spec for is oil weight. He assumed it was either 5 or 10 and the rebound circuit should be a big clue. I’m assuming it’s either 5 or 2.5 as it’s a trials bike and needs to stay bouncy. Thanks
  2. I want to run this by those who have done it already. My son's 36v 16 needs new batteries and spending $100US for 50lbs of lead seems silly. If I were to buy 4x 5s 25c 5800mah/5000mah hobby king packs with 2x 10s 60a BMS boards I can have a 10s2p 37v 11.6ah/10ah battery pack that will deliver the needed 40A current. I could simply split the 2 10s banks and charge with 2 cheap 42V2A ebike chargers. Correct? Thanks.
  3. I'm about to do the same thing with my son's 16. I have a couple questions. How much run time do you get from the 8000mah batteries? What C rating did you use? Are you running a bms or just charge when 1 led goes out?Do you charge parallel or series? thanks
  4. Replacing my levers to day I noticed the brake lever stop store is missing on my montesa. Anyone know what size thread this is? It looks like maybe an m9 but that's a pretty odd ball size. M8 nearly grabs the threads and won't hold the lever in place 10m doesn't fit. Thanks
  5. I recently ordered a couple Jitsie airfilters for my 05 4rt. It's pretty obvious that they don't use the stock mesh flame arrester, but to you use the top plastic frame or just put the bolts through the holes in the filter and call it good? I've been using the plastic holder and bolt holes in the filter are getting torn off. Thanks.
  6. I know this is an old topic but how have the bushing faired long term. I took my bearing sapart to lube today and 2of the 3 are trashed. I think a good bushing might be te answer especially sine I ride is lots of water and mud.
  7. I just double checked the torque spec and yes they have been over tighten by about 20%. I was confusing axel specs with my other bikes. Thanks guys.
  8. How long do rear wheel bearing last for you? I replace the one on my 4rt about 3-4 months ago with good quality skf bearings. Last night while I was installing a new sprocket I notices fhpse. Eating are already very notchy feeling, but there is any play yet. It seems to me they should last a whole lot longer. I mostly use the bike from trail riding. I would guess I have about 400 miles on these bearing. The have see their fair share of mud but never with more than a garden hose. I even Froze the bearing and heated the hub so I didn't need to use much effort to press them in when installed. Any thoughts? Thanks
  9. Yes there are 2ocal suspension shops that can custom wind anything I want as long as they have the required measurements.
  10. Thankfully this was easier and cheaper to fix than at first thought. It took longer to get the parts in hand than it did to actually get the bike rideable again. My pickup coil was the reason I wasn't getting spark or fuel. I assume the ECU didn't know the engine was even turning when I would kick it over. The only way to replace the pickup coil is to buy a complete stator assembly for $250-300. I really didn't want to have to do that since the knew the stator was good. I started scouring sources online for pickup coils only to find out there weren't very many. I did find this spec list for Eletrexworld.co.uk http://www.electrexworld.co.uk/acatalog/Online_Catalogue_Pick_up_Coils_160.html that pointed me in the direction of what other bikes might have the same pickup. It ends up KTM sell their pickup coils as separate units for $68 new. Being a cheap ******* and not wanting to blow $70 on a hunch I found one on Ebay from a 04 450 exc. Once I had the KTM coil in hand it was almost identical to the stock unit except for the shape of the mounting plate to allow clearance for the stator wire hold down. A little file work and everything fit together perfectly. 2 kicks and it runs like a champ If anyone ever has this issue the KTM part that I used is 59039034000 PULSER COIL KOKUSAN 4K3-A/B which is used on almost all KTM singles from 98-05. I want to thank Dennis at OverlandTrial.biz and Don a Cascade Motorsports in Mission BC for letting me pick their brains and come to the conclusion that it was only the pickup coil and not something more complex.
  11. I got a chance to dive further into troubleshooting today. He good news is the fuel pump runs with an external power source. WIth everything connected except the R/R it still have no spark or squirt. I pulled the injector to verify there was no fuel. Going through all the steps in the manual everything checks out accept the pulse generator which reads as an open circuit. I haven't pulled the side cover yet to check the wiring, but that is the next step. Is there anything else that would cause no spark and no fuel? Is there a flow chart anywhere of how the FI system on there bikes work?
  12. I spent some time putting around the yard last night and the bike ran perfectly for an hour or so. I attempted to go for a ride today. When I got to the trail head as usual I went to start the bike to warm up. It started on the second kick like it normally does, but only ran for a few seconds and died. I tried resetting the ECU and disconnected the kill switch to no avail. When I got the back home I pulled the plug and I can't see any spark I tried a new plug and still no spark. The plug is pretty dry after a few kick overs and there isn't much fresh gas smell coming out of the plug hole when checking for spark. It was raining today and I transport the bike on a hitch hauler so I thought it might be water intrusion somewhere. I've gone through all the connectors around the R/R stack and coil. There's wasn't an excessive amount of water anywhere. the center pin of the BAS plug was a little corroded so I cleaned it up. I jumpered the outer 2 leads of the BAS and it didn't seem to make any difference. I pulled the BAS and is does rattle a little bit, but it also sounds like it filled with liquid. Is that normal? Am I jumpering it correctly Red/white to Green? Any other thoughts of what might be the cause? Thanks.
  13. I've considered the vmar top clamp but I want to hold off dumping too much money into the bike until I have more peg time on it. I'd rather spend $200 on new springs first. Right now my goal is to get it set up and rideable then figure out what needs changing. Ican get the drz bars for less than $50 so it is my cheapes option and will get me in the neighborhood of where I think I want to be.
  14. I got a good deal on 05 4RT a couple weekends ago. I haven't had much chance to ride since picking it up, but hope to change that real soon.
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