I also have the JBM boots and echo what Grizld1 said. Good part and great guy to deal with. I HAD to buy these boots since I got a grand total of 28 miles out of the set I got from Mikes, literally 28 miles. I have no idea how ethanol can have such a dramatic affect after only 28 miles but whatever. The JBM ones are at 415 miles and counting. Highly recommend them if you need a set.
Oh I know it's pretty nasty stuff. But I can't imagine selling a product to a community I depend on to make living that could fail that fast. Instead of saying ethanol CAN ruin these boots, it should have said these may not last a week if you run ehtanol, in which case I would never have wasted my $40+ dollars on them to start with since you can't buy non-ethanol gas anywhere anymore.
I can believe it. The stuff is nasty. I not only found out with carb boots but also so with a more expensive item and that was an Omars tracker tank. I sent the tank back to him a month ago after he said he would replace it and haven't heard a peep from him since and so far no tank. I guess I will have to get gas from a race fuel place here in town whenever I want to ride my tracker. Thats providing I ever see that new tank. Aint that damn handy. jefft
You guys are misunderstanding me. I KNOW ethanol is nasty. What I don't get is continuing to sell them to a community you depend on for your business. If you are selling a product to a guy you KNOW can fail before he gets back home from his FIRST ride on the bike, then that seems like bad business to me. Actually it is the definition of bad business.
Guys, here in Illinois 10% ethanol fuel has been around for over 30 years, and it's been hard to buy gas without 10% ethanol content for around 20 years. There are plenty of old high-mileage bikes with the original OEM rubber boots around here that have never been run on anything else, so don't get the idea that your OEM or Tour Max boots won't stand up to 10% ethanol--they will. Re. the old boots from Mike's, ethanol may have broken them down faster, but the rubber compound simply wasn't up to the job regardless of fuel, particularly if carbs were run unsupported with the air box removed.
The biggest problem you're likely to run into from first-time 10% ethanol use is a rapid dump of partially-dissolved varnish and crud from the fuel tank. Use in-line filters, and have some spares handy.
I have run a set of Mikes boots, on my 77 since June or so,, i have about 2500 trouble free miles,, BUT, from the get-go, my intuition said to use the old stock Yamaha metal shrouds around the new rubber boots. (yes, you grind them a little, at the barbs, which have vacuum ports,, which are plugged, which i have NEVER had any trouble with the plugs staying on, and no cracks, or air leaks, but you guys got me worried, so I have a spare set now) Be sure to retighten the little hex head bolts on the shroud, after the motor has been hot. NOW... I have a 2 nd set of Mikes boots,, on my 75 XS,, they lasted some 200 miles... One cracked on the side, due in my opinion that they may have been older generation boots, as they just looked "rubbery" , but I feel 99% of the crack in the side (which let air in) , is due to the local Md Bonsboro bike shop, did NOT know, to use my old Yamaha shrouds to help support them. (nothing to do with Ethanol ) NOW, I have only run the 75 XS, with new 2nd set of Mikes boots, and my old shrouds, for about 100 miles now, so it it too soon to tell for certain. I have always had aftermarket air filter- pods, on both bikes... I feel Mikes did fine by me, replacing them within 4 days of first e-mail, to my house, free of charge... BUT if i were Mikes, i would state in the product summary, or assembly instruction, if you do not use the stock air boxes (which provided needed support) "you must use stock shrouds", around new boots. ( AND yes, you need to file or grind a little slot, in the metal shroud for the vacuum barb,,, BUT be sure to match left to left, right to right FIRST, or you end up with two nice little grind areas, on the old shrouds ) regards. PS , after looking at JBM units on line,,,, there is NO doubt they are more stout... and if I ever need another set, it will be those. Preston
Right, Preston; unless you're using JBM's with their heavy-duty flanges, the shrouds are very important; they not only provide support, but also distribute pressure around the flange. If you're going to retorque (I've never had reason to), do it after cool-down; in my experience, overtorquing causes more trouble than the reverse.
Your local shop should have known better, but breakdowns were reported in installations with and without shrouds, with and without air box, for a couple of years. I've held the offending product in my hand, and the material was much lighter and less rigid than new OEM or Tour Max. It's interesting that in spite of complaints, Mike's XS didn't offer improved boots until the JBM product hit the market. Coincidence? Maybe.
I haven't used the diaphragms myself (no diaphragms in my carbies), but I've heard much good and no bad from those who have. Don James' specialty is parts for ultralight aircraft, where selling problem parts will put a guy out of business (and also out of everything he owns!) in a hurry; the man doesn't sell junk!
Cros - I have a set of Don's diaphragms in my 79, and haven't had any problems, yet (except installing them - they go in VERY tight - but need to to make them seal properly). Of course, we can still run gas without ethanol in it, and that's what I run in mine. If I'm right, he probably uses the same formula rubber in the diaphragms and carb boots, so there shouldn't be any problem with them.
I'm a happy customer, and if I need new boots for my bike, Don will get a repeat customer!
Definition of an Expert-
An Ex is just a Has-Been, and a Spurt is just some poor drip under a lot of pressure.........
Okay, I just received a pair of the angled BS38 JBM carb boots. Are you guys using a gasket when you mount them? What about Yamabond or sealant?
I called JBM and asked Don, but he did not have a definite answer. He said they were designed to not use a gasket, but that he doesn't actually use them, so he doesn't know if a gasket is needed to make a seal.
I'm not sure if you NEED them, but I had a new set of the stock ones and they worked with the JBM ones. I would use them if I were you, but I have a motor that I don't want ANY gas on too so take it for what it's worth.
r80rt: :)This is a splendid write up, THANK YOU!!!!
Dec 26, 2015 16:54:05 GMT -5
mashermoto: What the what is this shoutbox for? Or should I shout, WHAT THE WHAT IS THIS SHOUTBOX FOR!
May 12, 2016 22:22:21 GMT -5
motormike: Good Day ...just a FYI.. Wild Cat is this Labor Day weekend. Still go'n on. A few 650's still make the scene. Various rides at different skill levels each day.. awards dinner sunday eve. BS in the park'n lot after dinner.
Aug 23, 2016 7:57:01 GMT -5
lsettle: First post in over 6 years!
Aug 28, 2016 19:45:17 GMT -5
kardon: Wow quiet here, where did they all go.
Oct 7, 2016 2:18:13 GMT -5
gggGary: XS650.com LOL
Feb 16, 2017 20:49:02 GMT -5
buell88: Anybody have any idea who built the xs650 tracker used in the Draggin Jeans Ad on Pipeburn?
May 16, 2017 16:24:09 GMT -5
joshua: The regulator/rectifier unit I got from Mikes PMA has closer hole spacing than original. Are we supposed to mill the holes to fit?
Jun 7, 2017 19:25:58 GMT -5
joshua: My bad. I found the bracket they supplied to mount the rectifier/regulator... Uh oh. How is this meant to work? Which way is it meant to mount? Looks like I have to use some spacers or something. Good instructions would be nice.
Jun 7, 2017 22:09:52 GMT -5
craig8johnson: Not sure if this is the right spot or not but oh well...
Jul 11, 2017 18:04:15 GMT -5
craig8johnson: I'm checking the charging system. I'm afraid I might have fried the last battery. With the solid state regulator (after market) what should it be charging at. The book says, I think, 15 volts. I'm hitting 17 when revved. Is that too high?
Jul 11, 2017 18:06:19 GMT -5
gggGary: Yes 17 volts is too high, about 14 volts is max, sounds like you don't have the right regulator or it's wired wrong.
Jul 13, 2017 6:54:33 GMT -5
dean: Just saying Hello, new member who is going to fix up a 79 XS650 that has seen its better days. I will definitely have lots of questions coming up.
Jun 23, 2018 16:45:32 GMT -5
tt650: Trying to breathe life into a 1980 that's been stored (indoors) for 25 yrs. Air filters are dry rotted. Have cleaned carbs but she only runs briefly on choke then stops. Need jet setting info and other ideas that might help her idle and rev.
Jul 3, 2018 19:15:19 GMT -5
trix13: Hey everyone! New to the forum and am fighting those gremlins!! New charging system, ignition switch, coil and fuse box. Resistance is higher than normal on the ignition pick up so I'm trying to find one. No such luck yet.
Aug 16, 2018 8:50:48 GMT -5
trix13: Also, even though all of my connections are clean, I cannot seem to find out why , when at higher rpms, I hit the signals and the rpms pulse with the signals...hahah. same with the brake light. I appreciate all input!!
Aug 16, 2018 8:55:08 GMT -5
bob99: how do I post a question. I am new to the forum
Jun 6, 2019 10:52:10 GMT -5
adlpc: Hello all! Been enjoying your edifying posts and discussions - and as a fan of the XS650 since my early teenage years happy that I now own a 1980 Special which I plan to turn into a vintage half faired racer. Thank you all for being here!
Oct 1, 2019 0:58:56 GMT -5
jimothyj: Hello everyone, I just joined & wish would have known about this site in 2014 when I brought my 1974 TX650A back from the grave. I have spent a good deal of $$ and alot of time on it. Just painted it and working on electrical, I will post pics soon,
Apr 10, 2021 2:14:13 GMT -5
louisvan: trix13 - I had a problem with my 1975 SX650. When I got to highway speeds, the engine lost power. The problem was in the connectors. At a certain vibration and the wind pushing on the wiring loom, the connector lost continuity. A bad crimp to the wire.
May 20, 2021 1:19:09 GMT -5