Moise wrote:maddog82 wrote:so far i have rebuilt the engine from the bottom up, new shell, mains, rings, top end refresh with kent cams, and tuned to suit, home brewed pipe using stock headers, .. i cut out the merge chamber with that heavy exup and made my own collector, into a yoshi mid pipe and A16 end can, .. but im now waiting for my full yoshi system to come in the post, ... also upgraded the rear shock to ohlins, keyless ignition system, DBR adjustable rear sets HEL braided lines, i have a fair few more mods i'd like to do but its just time.. money and figuring out how to do them.
thanks for reading
There's quite a few happy 4xv and 5jj owners here. And a couple of knowledgeable ones if you have any questions (not me!).
Just curious, did you check the gearbox when you had the engine apart? How was 2nd gear?
like moise i know a bit about the 4xv & 5jj but some of the guys on here like Alex_H , Mezzer & r1aoc really know they're onions , personally i'm happy with a standard engine but i know theres a lot more potential .
as great as the 4xv is from what i've seen i'd have to say from standard the 5jj is the better bike due to power delivery !
theres a few threads on the differences on the two models , the 5jj has a better midrange which i love but for some it makes the 8-9000 rpm hit of the 4xv feel a bit more tame as the power delivery is smoother . If i remember correctly the main jests on both bikes carbs are the same but the 5jj has bigger pilot jets .
here's the standard post i put up to new owners of the 4xv & 5jj models , i hope it helps
" Those 5jj's are a lovely bike , they share a lot of parts with the 4xv like frame, wheels & engines are similar , things that are different are ECU , bodywork i.e. tank , fairing , seat unit & headlight also the radiator & wiring looms are different .
Make sure you look in the 4xv & 5jj sections .
Check the main 20pin white plug on the wiring loom that sits behind the left hand fairing to make sure its in good order & been greased as these can cause problems , the HT leads can break up when old where the plug cap screws on & cause misfire all you need to do is cut 5-10 mm off the end & screw the cap back on , also DON'T tighten the sump bolt up to 42nm its a lot less more like 15-20nm .
get the service manuals and parts micro fiches for both the 4xv & 5jj downloaded , use the online PDF link & down load the parts manuals from there .
http://www.partzilla.com can be helpful for online parts micro fiches for getting part numbers & checking prices in the states you can then enter the partnumber into O.E.M part search on places like
http://www.wemoto.com
enjoy
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