Wednesday, March 12, 2008

Update of sorts...

Well I haven't had much time to do any work on my bike since installing the replacement subframe. I had a "shorty" mx silencer laying around that I repacked and installed on the Gas Gas. It will work as a temporary fix, but I'll need to be replaced before my next enduro. Being an mx silencer it does not have a spark arrestor needed for riding events on public land. Additionally, because it is shorter than the stock silencer, it is loud. Too loud in my opinion. Since most of my practice is done on private land, the excessive noise won't keep me from riding. Noise has always been the biggest enemy of our sport, so I'm going to have to find a quieter solution.


My Bultaco is still hibernating in the backyard shed. I drained the fuel tank, cleaned and re-oiled the air filter and capped off the silencer before putting it away. I'll need to change the primary and clutch oil when I drag it out this spring. Also thinking about running a different premix ratio since the engine sees low RPMs when I'm riding. I've been using 40:1 since I rebuilt the engine in 2004. This is the same ratio I run in my Gas Gas. It works, but some plug-fouling last year, particularly in summer, has me thinking about using a 50:1 ratio and dropping the needle one clip position to lean out the air-fuel ratio.


My biggest challenge this spring is going to be as Trail Boss for the NETRA-sanctioned CATRA hare scramble on May 18th. One change I did make was to actually give the CATRA H/S a name, the Black Fly. In reference to those little biting flies that annoy the heck out of you by buzzing around our head and biting the crap out of you. I need to get up to CATRAland and scout out last years course. In my mind I kind of know what I want to do. I'll be making some changes to last years course, but will avoid reversing the track direction. The Minis, which is the 9:00 a.m. race, will have ~3 mile course and the Novices, 11:00 a.m. race, will have ~6 mile course. For the Amateurs/Experts, 1:30 p.m. race, I want to add ~1 mile of more difficult terrain which should "seperate the men from the boys."


To really spice things up I added vintage and post-vintage classes to the 11:00 a.m. race. These are non-NETRA points "just for fun" classes. It was difficult to try and figure out how to identify bike eligibility for these two classes. It seems every sanctioning body has their own specific rules regarding what is vintage and what is post-vintage. Even NETRA has their own rules, but I didn't like them. In the end I decided anything 30 years-old or older (1978 model year or older) would be considered vintage. Anything 20 to 29 years-old (1988 through 1979 model years) would be considered post-vintage.


All things considered I've still got a ton of work ahead of me and I won't be able to compete in the next NETRA Enduro, which is one week before the hare scramble. Maybe I'll get to ride a trial or two, but only if work on the hare scramble is on target.

Flyer for the CATRA "Black Fly" Hare Scramble.

Thursday, February 28, 2008

Gas Gas Maintenance - 3

Following my DNF at the Snow Run Enduro, I removed the subframe from my '03 Gas Gas. It had broken in two places. One place looked like it had been broken for some time and the other break was fresh. Additionally I found two more cracks in the subframe. Three of the four fractures were in the heat-affected zone near a weld. After consulting with an experienced aluminum welder, I decided it was not feasible to repair the broken subframe.

These three pieces were once a complete subframe.

Unfortunately a new, aftermarket, subframe is $220. As you probably know by now, I'm cheap. So I hit up the internet looking for a used subframe. After a couple days I came across a couple leads. One was for an '03 aluminum subframe, for $125 + shipping. The other was for a '97 steel subframe for $50 + shipping. Have I ever mentioned that I'm 1/4 Scottish? Well If I haven't, and you know how tight a Scotsman can be with money, it doesn't take a genius to figure out which subframe I bought. Although heavier, steel is stronger than aluminum. However, I knew it would not be an exact fit as there were quite a few changes between the '97 and '03 models.


Here is the '97 subframe with most of the parts bolted back up. Excuse the dirt as I didn't do a great job cleaning up after the Snow Run Enduro.

The first problem was bolting up the seat. The mounts on the back of the seat base would not line up with the holes in the subframe. I knew somewhere there was a change made as the seat from my '01 Gas Gas would not fit on the '03 either.


This was as close as I could get the '03 seat to align with the mounting holes in the subframe.

Luckily I had a spare seat from my '01 Gas Gas still laying around (actually it was at a friends house). A quick test fit showed it would bolt up. However the '01 seat did not have the tall seat foam that I need.


The spare seat from my '01 Gas Gas lines up almost perfect with the subframe holes.

Looking at the seat mounting tabs, it is obvious why the '03 seat does not line up. They are different. Since the '03 seat has the tall foam, needed for anyone over 6-feet tall, I decided to drill out the rivets and swap the '01 tabs onto the '03 seat.


With the '03 seat on the left and the '01 seat on the right, you can see the difference in the mounting tabs.

It took about 15-minutes to swap the mounting tabs over. Now the seat fits perfectly. The next project to tackle is the silencer.

Tuesday, February 19, 2008

2008 NETRA Snow Run Enduro

After taking most of last season off, I decided to get back in the saddle, so to speak, and chase points in the NETRA B-Senior Enduro Class for 2008. I actually started my quest early this year going to they gym 3 days a week working on cardio and strength training. Additionally I've been skiing at least one day a week, getting my legs in shape. For two Sundays prior to the Snow Run Enduro I went riding, getting use to riding in snow and getting the bike dialed in. I was ready... or so I thought.


At the start of the 2008 NETRA Snow Run Enduro. That's me, second from the left in the blue & red outfit. It started raining just after this picture was taken and things went from bad to worse.

Because the Snow Run takes place in February, conditions are very unpredictable. This year, above normal temperatures left little in the way of actual snow on the trails. What was left was a mixture of mud and rocks. Combine an outside air temperature just above freezing with moisture falling from the sky and you've got rain. In fact it started pouring just after the above photo was taken, while we were riding down a paved transfer section, to the first test section. Now I don't mind the cold so much as I dislike being cold and wet. It took me a while to get into a groove and I ended up dropping 6 minutes in the first test section. Not a spectacular start, but I figured things could only get better. How wrong I was.

Following the first test section was an off-road transfer section. It was here that my front wheel decided to tag a tree and send me over the bars. I hit the ground with a thud followed by an ouch as I cracked a rib. However, not wanting to be a called a pussy, I continued on. At the second test section I zeroed the check-in and started getting into a good groove, despite the pain. In fact I was really doing good until I arrived at the swamp. This place was full of mud holes and bikes buried up to their handlebars. I was doing a pretty good job navigating around some of the deep stuff until my front tire got buried in a deep rut. I used up a lot of energy getting the bike unstuck. When I finally got going I tried making up for lost time, but tagged a rock with my foot and broke a toe. In all I dropped another 13 minutes and 3 seconds in this section.

At the gas stop I decided to mess with my bikes idle since it was idiling way too fast. I left gas and proceeded through a couple more transfer sections before getting to the third test section. Once again I zeroed the check-in and started riding balls-to-the-wall. I was getting into a good groove when suddenly, without warning, the bike made a loud noise and quit. I attempted to re-light the motor, but the loud noise told me something wasn't right. Major Joe pulled up next to me and said: "Look at your seat!" Crap, the seat was sticking up in the air. Turns out the subframe snapped in two places, pulling the carburetor boot off the reed block and shutting off the fuel supply to the motor. Using a couple zip-ties I redneck-engineered the bike back together and decided to call it a day, riding back to the pits standing on the pegs. By now the temperature had dropped and I was soaking wet and freezing.


My pitiful score, 22 points to check 6. A firm grip on last place in B-Senior. Probably could've beaten a couple guys had the bike not told me I'm too fat.

I had a solid lock on last place in B-Senior. Only made six of the 13 checks. Not even 50%, so I won't get any championship points. Time to fix the bike and let my body heal.