Messages

346

Tech Talk / Re: Mikuni Question

« on: January 17, 2017, 10:51:21 am »

Yes , we synchronized them from bottom up and checked with the mirror to make sure of that . Yes I have spoken to Ian  and showed him the carbs . They are made by Mikuni , but for Kawasaki  triples only . Slides are different and the shape of the jets are different to the normal Mikuni parts . Of course being from 1974 most Kawa  part numbers are obsolete now . With all your blokes input in mind  I will redo them again , maybe I have over looked something very little . I will give it one more go , otherwise  Ian recommended to go for the new half round carbies and then there would be plenty parts to play with . Thats the fun with those old girls , they are a constant challenge , but soo much fun to ride when they are on song .  Some blokes in UK have welded reed valves onto  them for better down low delivery , but some how I feel it defeats the purpose of going for that type of bike .

347

Tech Talk / Re: Mikuni Question

« on: January 17, 2017, 08:13:31 am »

Makes sense , I will give that a try (if they are obtainable ) Thanks

348

Tech Talk / Re: Mikuni Question

« on: January 17, 2017, 06:46:04 am »

Lozza , wouldn't lifting the needle more , exaggerate the problem more ?The first 1-5 mm of slide lift , that is where it is too rich , after that it all comes good .

349

Tech Talk / Re: Mikuni Question

« on: January 16, 2017, 01:19:46 pm »

Pilot is 45  Main is 110 .Needle seat is new and needle has 5 clips ( needle in bottom position , fully rised . )When I drop the needle it is starting to surge in mid range (to lean) . Plugs are brown  and fuel consumption yesterday was 21 liters for 160 km !!!. I have used Dellortos all my life and there you have a great arsenal  combinations to cure things . But because those carbies are OEM , parts are limited and not the same as the after market Mikuni . If all fails , I may go to modern half round slide Mikuni if they have one with oil feed in lines for the H2 C . I will try a few things that have been suggested .

350

Tech Talk / Mikuni Question

« on: January 15, 2017, 08:20:05 pm »

I have some issues with my carby settings on the 32mm round slides . The bike starts easy , it screams top end , but around 5 mm lift the the engine (3 x 250 cc ) starts to four stroke like if it was very rich . But as soon as you go another 2-3 mm in lift , the power band comes in and all is clean . I dropped the needle to the lowest clip and  and it improved , but not enough . I think the pilot is OK , but lowest point of the needle is not .Mikuni does not offer different needles for this carb.  Could it be the cut away . At the moment it has 2.5  and no others are available . If I turned down the 2.5 Slide  by 0.5 mm , would that make approximately a 2.0  and lean it off ? I know its a bit of bush mechanics , but am I on the right track ?

351

Tech Talk / Re: WP4054 fork availability

« on: January 05, 2017, 09:05:07 am »

Still have some . $750 per pair .

352

Tech Talk / Re: advice: ohlins vintage find

« on: January 04, 2017, 07:53:04 am »

When you change the springs , then the damping needs to be adapted to the new rate . In this case there are no adjusters what so ever , so you have to get someone to pull them apart for each change . Remember you will have to run them upside down again (like the ones you already have ) because of your fitting issue at the top on one side .

353

Tech Talk / Re: advice: ohlins vintage find

« on: January 04, 2017, 07:47:33 am »

The springs should be 46 ID , same as ours . You can go 2 stage like in your pic or one piece in a progressive rate . Some love the single rate springs  and others like the one piece progressive , depending on your preference .

354

General Discussion / Re: YSS X-mas sale 2016

« on: January 03, 2017, 11:03:27 pm »

The sale is nearly over , dont let your bargain slip away .

355

Tech Talk / Re: advice: ohlins vintage find

« on: January 03, 2017, 09:45:12 pm »

hostare immagini

i just found these shocks (rare find indeed in italy..) on sale at 600,00 eu (less or more are  600 USD); the seller claims they are fully rebuilt by a specialist..

price its' high (basically what i need to buy a new set (but no piggyback) from YSS\works performance etc..)

but they are ohlins (ITC, correct??)..

 looking the picture looks like the travel is too short (less then 100mm).. isnt'?

what do you think? grab or pass??

Do a few sums Paulo . You pay Euro 600 for shocks with 12 mm shafts and 36mm bore . They have no threaded preload adjustment , they have no rebound adjustment , they have no compression adjustment , and you may have to pay to get the travel right and you may have to buy springs.( I suspect they are Maico)  But you will have Oehlins , if thats what you must have . Not trying to upset the professors , but think about it . The shocks I quoted you on have exactly 12 mm shafts and 36 mm steel bore BUT come made for the job , have threaded proload  and rebound and compression adjustment if you wish . Like I said , this not to upset anyone of course , just a hint to think about the sums and the features you get , because many do not compare apples with apples and are rather focused on a  name . If you only paid 100 Euro , then you have room to make all the changes if you have to set up to do it . Over to you Paulo.

356

Husqvarna / Re: Race Tech Emulators and YSS PD valves

« on: December 31, 2016, 09:06:14 pm »

The PD valves are designed and made in Australia . Depends where you live , you support your local product . http://store.suspensionshop.org/bultaco/mx/1980-1989/70-80-matador-pd-fork-valve.html

If you want to live in a country that build things .... you have to buy things your country builds ...

357

Tech Talk / Re: air shocks fox\kyb.. you got any info?

« on: December 31, 2016, 07:56:47 pm »

felice anno nuovo, I raced in Italy many times . Great food , great ragazzas , great tracks . Today we have happy new year , no more ammortizoro  till  2017 . Happy New year .

358

Tech Talk / Re: air shocks fox\kyb.. you got any info?

« on: December 31, 2016, 07:15:12 pm »

Chiao Bello , I thought you are up north near Asti . ( Because of the Elderberry tree) . Try Andreani . or http://www.motoshopitalia.com/yss-ammortizzatori-m-62.html

359

Tech Talk / Re: air shocks fox\kyb.. you got any info?

« on: December 31, 2016, 10:49:14 am »

yes tony your point sounds correct, but we are talking about 15 - 17 inches shocks..

so the question can be: does the decarbon system  (separate gas\oil) be mandatory to have a good shocsk (probably my english here is crashing..hope it's anyway understandable..)

and for walter: RZ362 YSS (no reservoir) are decarbon or emulsion?

Paulo , looking at the scenery , you must live in northern Italy . I think its best if you you contact our distributor there . You may even be able to take your bike there for a custom fit (highly recommended in this case )

360

Tech Talk / Re: air shocks fox\kyb.. you got any info?

« on: December 30, 2016, 09:06:42 pm »

I had to modify one of those shocks fitted with rod ends the other day . It was meant to be for a CR 250 79 . The stroke for that model should be 148 mm . The shocks (as mentioned above ) had rod ends fitted to achieve the 445 mm , but the stroke on them was 113 mm .(Basically a 390 mm shock extended to 445 mm ) No wonder he bottomed them out constantly . Rodends are great for road racing or short circuit where you don't need all the travel that the motorcycle was designed for . But for long travel MX you want max travel (like the original shock or longer)and any head angle adjustments are done with fork heights . Just saying , thats how I would do it , but then I am not always right .