Andyb1987

Thanks for the reply I think thats to complicated for me it will be easier to buy the dykes ring etc and have them machined to suit.

Can the cylinder be bored to take a different piston like a beta for example

Where did you get it from

Hi all which oko carb are people running on there 315r currently got the phbh 26cs which has seen better days. Thanks in advance

What ratio oil to fuel should used when there's roads and big banks then surely 80:1 is too little

Stripped down clutch casing today to inspect the plates i took the whole side casing off and the kick start spring didnt look right is was touching the outer basket so I removed and cleaned the kick start idler gear. The question is though when I put it back together do i have to put any tension in the spring buly winding it half a turn etc or do i just fit it straight in the hole as is? Pic for attention Thanks in advance

Ok thank you for your input I wouldn't know how ir where to start to get a head spacer made I did how ever put an additional base gasket of 1mm on the bike to no avail.

Increase base gasket size cleaned all carbon from head piston and exhaust carb is jetted to spec in manual running out of things to do

Have you found any cure

Has anyone used redex 0-60 octane booster in a 2 stroke to cure pinking?

Can anyone tell me what size pistons you can buy for a 250cc beta rev3 i know that a size D is 72.481 but what are the others also i need to know the gudgeon pin bore aswell does any one have a copy of the technical data page out of the owners manual. Thanks in advance

Thanks Thanks it currently has a 120 main 46 upper 46 lower needle clip is correct yeah thanks big help. Will order a new main straight away

No I haven't set the squish don't know what is meant to be? What difference will altering the port timing make? Where could I get the 1mm head spacer? Would a thicker base gasket give the same effect currently got a .5mm base gasket and pinking issues. What's driving me crazy

What is the standard jetting for the early 315 '97-'99 PHBH 26CS CARB? Only manual I can get is 2002 which has the newer carb

What difference will altering the port timing make? Where could I get the 1mm head spacer? Would a thicker base gasket give the same effect currently got a .5mm base gasket and pinking issues. What's driving me crazy

Gazza where can I get a 1mm head spacer from?

I have no issue with starting running or anything other than when I rev it and close the throttle I get a rattle on run down

Hi again all I have a '99 montesa 315r currently having pinking issues what size base gaskets are people running I have a .5mm on at the minute and its driving me crazy also have a 46 pilot jet and a 120 main jet I read alot about people fitting a thicker base gasket and even fitting 2 but what size. There are .3 .5 .75 1.0 any advice is greatly appreciated.

Where could I get the 1mm head spacer? Would a thicker base gasket give the same effect currently got a .5mm base gasket and pinking issues. What's driving me crazy

Thanks a lot currently having issues also what year 4rt mudguard did you use?

120 main 46 pilot assuming the main is the one the keeps the bowl on

I have a montesa 315r with a slight bend in the header pipe and it doesn't quite seal on one side when bolted on what sealant can i use on the joint where the exhaust connects to the cylinder? Thanks in advance

What's the 1mm head spacer to cure pinking issues

Thanks for the replies everyone no it's not the chain on the frame. I've had the bike six month or so honestly don't know which jets are in the carb I did strip and clean it when I got it I pulled the head off for an inspection and refitted with new gaskets I measured a part of the base gasket which had not been flattened using a caliper gauge which came out at .45 to which I assume is a 0.5 gasket I've been searching for weeks on the internet and read a post regarding base gaskets but that was on ktm 2stroke motox not trials so not sure if it relates or not I am a total novice when I comes to two strokes. I changed the exhaust manifold gasket when I put back together but the header pipe doesnt sit fully in the recess could this be the problem. Also changed all fluids wheel bearings linkage bearings

I have a montwas 315r 1999 2 stroke I'm getting a slight rattle/knock when I close the throttle (on run down) there are 4 different size base gaskets 0.3,0.5,0.75,1.0 I currently have a 0.5 on could this be the cause I'm no expert when it comes to 2 strokes any advice welcome