farmerj

That makes sense, either/or and use oil volume to set a baseline for future oil level measurements. Thanks Biff!

Thanks Biff, I was wondering about measurement from top of slider (vs. replacement volume)? I've read 100mm, but also 160 in the newer forks... An example of the question here, http://www.trialscentral.com/forums/topic/34074-09-gas-gas-pro-fork-oil/ ...but specs for the older forks are not referenced; I don't think the '01s had aluminum Marzocchis.

Jon, Old topic, but how about fork oil level for the same bike? (mine is a 2001 txt 321) Thanks, Jeff

Great question! I have a Husaberg FX 450 with a close ratio transmission, and 1st gear is just too high for some of the riding I do. So I've been comparing final drive ratios with my other bikes, after running them all through the same trail/course. I thought I'd try to see what it would take to get the FX 1st to compare to 2nd or 3rd in the TXT...so I'm having fun with a spreadsheet and learning a lot about gearing!

Thanks for the responses, that makes sense!

Hi, does anyone know what the Primary Drive ratio is for a TXT? I have an '01 321. Tried a search, but couldn't turn up anything. Thanks, Jeff

Thanks, that all helps! Jeff

Thanks Ted. I think this must be what happened to me - file://localhost/Users/jeffjen/Desktop/Trail-riding%20Meltdown%20-%20Is%20Race%20Gas%20The%20Answer%3F%20-%20Gas%20Gas%20-%20Trials%20Central.webloc So would you guess that I need to go up 2 sizes on the Main jet? Jeff

Say Cope, Do the answers change if you are trail-riding the bike (not trials,) trying to keep up with the pack on their enduro bikes? More oil then? Or no need? Jeff

Wow, you guys are awesome - thanks so much! I'll report back my findings! Jeff

2nd ? of the day - Does anyone know what kind of compression reading I should expect from an '01 txt 321? When looking through the exhaust port, I can see a couple of lines or vertical scores on the piston. I know I got some sawdust particles into the engine a while back. Wonder if that has affected things, and whether it's time for a new top-end...thus the question about the correct compression reading. Thanks, Jeff

Hi guys, '01 txt 321, seems to be running hot - the exhaust header is turning blue, and it just feels hot, the exhaust and all. Plenty of water in the radiator, and the fan is working. I'm wondering if there is a thermostat that can go bad? (I don't know how to check it...) Can the water pump impeller strip or quit pumping? I recently went to Boyesen reeds - am I running a bit lean? Just looking for some ideas. Jeff

Uhoh, that is just stunning territory. What are you using for pressure suit/chest protector? I like the coverage! Jeff

Steve, I've done a bit of work on this, and thought I'd offer my opinions - though everyone has to find out what works for them. (1) The idea of a "sit down" trials bike is great in theory - but not necessarily in practice. Yes, it's nice to sit and rest your legs at times - but adding a big seat and trying to ride it like a "trail" bike doesn't really work. The beauty of the trials bike is in its balance and traction, it's maneuverability. A large seat (I fitted one off my KDX just for fun) transforms the GG into an underpowered, less responsive machine. (2) For a seat, I'd be thinking of something like the "Buttrest." Here you have a lightweight option that can give you opportunity to rest on straightaways. Currently I'm running a seat from mini-motocross bike, that fills the section between the tank and rear fender. (http://compare.ebay.com/like/270968743649?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar) The problem with using a seat of this kind is that a trials bike is not layed out with enough "cockpit" space - the distance between the top of the seat and pegs is short. If you try to ride the bike with a seat that puts your body directly above the pegs, your legs will be cramped and put into an unnatural position no matter how high you make the seat. My toes point toward the ground when riding in this position. The Buttrest alternative allows you to get your rear end back far enough so that your legs are not so cramped. http://www.buttrest.co.uk/ (3) Regarding fuel - First, make sure that you actually need more fuel capacity! You may be one of those "long-ride" guys, but I find that I can go for an hour or more, and usually loop back to the truck at some point anyway. While a large tank is cool, I've also read of guys that have great success with carrying MSR fuel bottles in a backpack. http://www.amazon.com/MSR-MSRFUELBOTT-Fuel-Bottle/dp/B002L1413S/ref=acc_glance_sg_ai_ps_t_4 Just more ideas. Have fun building! Jeff

This actually happened last fall. It was 80 degrees F, 3,000-4,000 ft. elevation, 3rd gear twisty trails through the trees. The bike seemed to be running "funny," not as smooth and a little down on power. Seemed to be running rich. Usually I'm at 500' elevation. Yes, I was pushing it - but I didn't feel it was much more than at other times. At one point it died - I thought I had seized it - but it started back up fine and I rode back to the staging area. I'll search for some posts on middle muffler cleaning. This one can't be taken apart! I've heard of guys cutting them open, then re-welding - which I can understand, given a new one costs something like $500! Jetting was 36 pilot, 114 Main, D36 needle. Thanks for your comments, those are helpful! Jeff