| Author | Message | ||
     Skntpig |
Does can anyone cut and paste the "buelistic" method for primary adj on blast? In the parking lot now. ThAnks | ||
| Zac4mac |
Back when I was having all my primary issues, this is the "bagged cat" method I got from Lafeyette to try. Measurements on how different methods vary is on a post of mine in the archives somewhere from last fall.Sorry for publishing it, but it had to be done. My comments are in quotes and have PdO after them to distinguish my editorial from the original instructions. The Blast has a built in chain tensioner, ie: SPRING,chain tensioner PN 24349-00Y which keeps a slight tension on the when going forward, BUT when backing off it lets it loosen to its maximum play ... The early SHOE,chain adjuster PN39946-00Y had two holes for aditional tension of Spring,chain adjuster PN24349-00Y and in one of the holes it made the SHOE "TOO TIGHT" and the later ones had only one spring hole as the FACTORY some how figured this out ... >>>>>>>> The only way to prove that your primary adjustment is too tight is to take the PRIMARY COVER PN 25521-00Y off and look at the SHOE,chain adjuster PN 39946-00Y and look at where the chain rubs on it ... If the chain has or is wearing into the SHOE,chain adjuster, it has or is being adjusted TOO TIGHT ...(Mine was tightened to Buell manual specs and worn thru to the webbing in 4k miles. PdO) >>>>>>>> The CHAIN GUIDE PN 39934-00Y in time will deteriorate and fall into the primary chain(the XBRR as a chain guide also and this PART should be removed) ... Left mine out !!! ( I kept mine. PdO) >>>>>>>> Now lets get to the task at hand, adjusting the primary chain as CORRECTLY (or most precisely. PdO) as possible with this system !!! >>>>>>>> 01) Get the rear wheel off the ground(as in standing the bike straight up) .... (I used a rod thru the axle and 2 milk crates. PdO) >>>>>>>>> 02) Remove the SPARK PLUG, this is so the engine can be turned over with the rear wheel ... >>>>>>>>> 03) Rocking the transmission gears with the rear wheel, put the transmission in 5th gear(as not to damage the transmission) ..(This makes sense when you do it. PdO) >>>>>>>> 04) Back off NUT 7/8"(lock), chain adjustment bolt PN 7804 all the way out to the end of the threads of the BOLT,chain adjustment PN3301Y holding the BOLT with a 1/4"allen... (or a wrench. PdO) >>>>>>>> 05) Now to find the Primary Chain tight spot ... >>>>>>>> 06) Back out(counter clock wise) the BOLT,chain adjustment PN 3301Y(to take all tension off the Primary chain ... >>>>>>>> 07) NOW slowly turn(clock wise) the BOLT,chain adjuster with a 1/4" allen PN 3301Y and ease it in to take the tension out(finger tight) of the Primary Chain ... (if you use your fingers, you can feel the bolt contact the bottom of the shoe. PdO) >>>>>>>> 08) Measure the length of the of the BOLT,chain adjuster from Primary Case PN 25521-00Y to the end of BOLT,chain adjuster with a small machinists ruler or just a ruler that the measurement can be made with and write the measurement down ... (you want at 1mm divisions at the largest, .01" is better yet. PdO) >>>>>>>>> 09) Back off out(counter clock wise) BOLT,chain adjuster PN 25521-00Y to take tension off Primary Chain ... (about a full turn works good. PdO) >>>>>>>>> 10) Turn engine over with rear wheel and REPEAT NUMBERS 06 thru 10 until(10 times is good enough) you get the longest measurement of BOLT, chain adjustment ... Use the rear wheel valve stem as a reference and rotate one turn each time to get proper length of adjusted bolt ... (a statistical sample size of 10 with one wheel rotation giving a different spot on the primary chain for each measurement. It is likely that this will get you the actual tightest spot. They do actually vary quite a bit. PdO) >>>>>>>>> 11) When you have done this the longest measurement is where the BOLT is at IT'S longest, you have now found the TRUE TIGHT SPOT of the PRIMARY CHAIN ... >>>>>>>> 12) NOW BACK OUT(counter clock wise) the BOLT, chain adjuster PN 25521-00Y from its longest length (as found in step 11) and add an additional 1/8 inch which will give you 3/4 inch chain play in reality ... >>>>>>>> 13) Hold the BOLT,chain adjuster PN 25521-00Y in place with the 1/4" allen and tighten the NUT 7/8"(lock),chain adjuster PN 7804 ... >>>>>>>> 14) Put it back together as you are done with this adjustment ... >>>>>>>> NOW THIS IS A LITTLE TIME CONSUMING, "BUT" YOU GET A "ABSOLUTE CORRECT" ADJUSTMENT !!! | ||
| Just_ziptab |
What ever happened to Lafeyette? Have not seen him post for quite a while.... |
