tony27

No keihin on the Jarvis, really an early release 05 with some extra anodising & different tank & rear guard graphics

They changed to a shock that likes dumping its oil

Last year I replaced all the windows in my house with that expensive double-pane energy efficient kind, and today, I got a call from the contractor who installed them. He was complaining that the work had been completed a whole year ago and I still hadn't paid for them. Hellloooo,..... just because I am blonde doesnt mean that I am automatically stupid. So, I told him just what his fast talking sales guy had told me last year, that in ONE YEAR these windows would pay for themselves! Hellloooo? It's been a year! I told him. There was only silence at the other end of the line, so I finally just hung up. He never called back. I bet he felt like an idiot.

[quote name='ZIPPY' date='Sep 15 2009, 06:48 AM' post='211828' Would it be horrible if Honda did absorb montesa? The Montessas are Hondas with a different name anyways. About the only reason to retain the montesa name is nostalgia from "The Hayday of Trials" Thats what they did in the 80s, something to do with getting around import laws in europe at the time & the brand was going cheap

You're lucky I had my verniers at home & know where the original reed block is, the screws are M3 x 5 or 6. It would still pay to take it with you when you see the fastening supplier as 1 trip to get the right size is better than 2

Neo you're going to have problems getting the right screws from anyone but sherco unless you change to buttonhead capscrews. I run a v-force3 reed block which doesn't have screws so have no idea on their sizing. Take the reed block to a fastening supplier & hopefully they can help you

That doesn't seem right, would pay to find out the correct pressure & get a shop that does shock rebuilds to add gas to the lower pressure 1

Still a lot cheaper than buying genuine, at the worst you'll just have to slot the mounting holes by cutting the metal around the rubber. Looks like the connections are the same unlike the 1 I used although everything was easily done

Millers still list the kit so it shouldn't be too hard to get hold of

Go play in some slow speed technical stuff like tree roots where you don't need the big handfuls for a while & things will be fine, roller bearings actually don't need bedding in unlike pistons & rings. Trials riding is really the best thing for running in a new motor because of the constant engine speed changes, just take it easy & make sure everything is working correctly

Thats my experience as well, pretty common fan motor & if its off the right bike even the blades are the same

Yep, think from memory txt280 from late 90s. Well suited to his riding but still not ideal for all the 1st-3rd gear stuff we do

In theory everything will have been well oiled on assembly. Seeing as you only had main bearings done you should be able to get away with a short period of gentle work before using as was intended. Adding extra oil to your fuel has the effect of leaning out your mixture, even from new sherco doesn't recommend extra oiling

Say it isn't so. You'd better keep any kids away from it as we now know that the law makers have worked out they like chewing on motorcycle plastics

When I first got hold of my new seals I thought they weren't viton either but if you look closely you'll see that they should be a dark grey & not black, nitrile seals generally have a slightly different design as well. If you get hold of a normal nitrile seal & compare it with your old seals you'll see what I mean

I think they screw into the radiator like the 99-00 bultacos did. Peter B will be able to confirm this

All the bits for my rebuild have arrived from Splatshop so the cases are sitting in front of the fire with the bearings sitting in the freezer in zip lock bags. New mains will go in tonight & may change the shims in the gearbox at work tomorrow so that the motor can go back together wednesday night. Have to work out how I'll run it in after that, have trial to set then ride next weekend & don't know if a trials bike trailride on sunday is best idea. Might just go for the drive & get some practise in at one of the 3 day nationals venues instead & hopefully get there after the guys have left on the long ride

In general a trials helmet would probably be lighter as well

Thats a lot more open than where we ride round here, even the place we do 3-4 day rides at is generally tighter & more under trees than that. Only 2 guys we've had ride with us on non trials bike have only done it once. One is now national enduro champ & other has a late model CR125 fitted with a gas gas 280 engine & softer suspension for technical riding Only time I use a full face helmet on a trials bike is sweep riding for the local enduro etc & thats mainly because trials bikes really don't do sand whoops too well & its always mid winter so the extra heat is very welcome

Is that gas gas admitting how expensive it is for a small manufacturer to develop 4 strokes?

About an hours drive from where I live in NZ is an area we ride year round, huge area that is shared by mountainbikers, motorcyclists,trampers & occasionally horses & 4wds. Trials guys can ride the mtb tracks ok as we don't do much damage but we have a lot of tracks only we know & make sure others don't know about. Some of our older tracks have been destroyed by one of the younger guys who now rides enduros using them for practise We also have a lodge we use for long weekend rides about 2 hours away, step out the door, hop on the bike & you straight into it. I'll try & post some shots off my phone later this week

I noticed the same thing with the base gasket on my 290 & asked Chris at splatshop about that, turns out that the transfers were made smaller in 05 so maybe find out if the 250 is the same & for some reason your cylinder is old stock(04 or earlier) with larger transfers I've never seen a conrod covered with carbon or whatever it is & think you've got some major blow by problems. Where on the piston did you measure, should be done roughly 19mm from the base of the skirt. Out of interest mine measures about .2mm smaller above the top ring than at the normal point, surprised me as the motor has no piston slap going on You should be able to change the seals without splitting the cases but didn't you try fitting new ones when did the mains & ended up nipping 1?

If memory serves me correctly 90's gassers used the same switch so might be worth checking on price for them

Neo, I pulled the mains out today & may have a reason for the increase in clearance from C3 to C4. When fitted they were quite noisy but once out of the cases they were quiet so maybe the bore for the bearings is specced a bit tight, other possible reason for noise change could be the cases acting as amplifiers I was amazed to be able to decoke the head with a rag soaked in white spirits after 5 years of use, the piston was also etched with its original size of the top, going off that I measure .02mm wear so I'll replace that as well

I got bored when fitting a slave cylinder kit to mine so now have a perfectly flat, works looking slave cylinder Get some bling adjusters for the carb when it arrives if you still want colour