its been awhile since I've messed around with my blata 2.5 (ever since my pullstart rope kept breaking) and been racing my ff cag at local races at the meantime. with the cag scene blowing up and the 2.5 fading away, I thought I'd be different? so I busted out my 2.5 from my garage (abit dusty from sitting around for several months) with no cash to spare due to the holidays and with the spare parts from cags laying around. the first thing was fix the rope problem! then get on the 6.5" wheels conversion, that i've always wanted to do but always ran into the problem of getting the front wheel to not hit the fairing. taking the cag hf whole front end and flipping it so that the disc brake is on the opposite side gave me a 1 1/2" gap between the fairing and wheel but ran into a problem of putting the 60T sprocket onto the cag rear wheel, the bolts were offset. so I took the 68T from the cag (easy fix!) now with the full 6.5" wheel conversion gave it a more stable handling.
knowing that blata 2.5's suck for low end compared to cags and once again low on cash but tons of spare cag parts. hearing that the stage one kit comes with a 68 jet, air filter + v stack, and clutch springs (some with dual reed cages) coming up with the idea that the 2.5 is lacking air and fuel. I thought of getting a dellorto 14/14 but with the money problems... I took the cag carb/intake manifold, and port and matched 15.5mm, 3mm reed spacer, triple tapered needle, and adjustable jet. with this mod alone, it gave me overall better low/mid/high end pull (also louder!!!) low end performance was the one I was looking for but I was happy that it pulled mid and high even more.
my 2.5 didn't come with the new 2004 pipe (thought it did) so I took a stock cag pipe and did the pipe mod. (1" off header and 2 1/2 to belly and added adjustable stinger inside the silencer) orginally wanted to mod the stock blata pipe but I was kinda iffy. since it worked well with the cag pipe, I'm going to do it to the 2.5 pipe and mount that on instead. this is another mod that gained over all performance!
I'm actually still looking for the racing springs for the 2.5 since it doesn't cost as much as a carb or exhaust but I need to do more reasearch cuz I don't know which spring rate would work best for me. I used 1.5's on my cag but it may not be the same for my 2.5?
I've also taken out one of the piston rings and used yamabond as my base gasket. giving me faster rpm response and even higher compression. (mods that I've also done to my cag)
for small/medium tracks i use 6/68 and for tracks that have a bit longer straightaways I use 7/68.
just thought I'd share this to all blata 2.5 owners. at first hated this bike with small minor problems it kept giving me but once that was worked out! I started to love this bike and the potential it has! now my cag is collecting dust hehehe... and being sold!
(below is a picture of my friends "red/white" 2.5 my 2.5 "black" before the mods)