Montesa 4rt Hydro Locked Engine Stripdown & Rebuild

[@gwoodward2264]

Thank you , I want one of these motor bikes ! I'm 62years have wanted a Trials bike for 40 years ! Live in Canada, British Columbia , great place for one of these Babies ! Thanks again for sharing the VID. Gerald Woodward

[@OKFrax-ys2op]

How many hours can be expected on the Honda engine before it’s rebuilt? Considering proper maintenance is done?

[@Oldbrokenbones]

Ever........ we had to do this, these bikes run for ever

[@OKFrax-ys2op]

@@OldbrokenbonesI just bought a 2018 Honda Monty with less than 200 miles on it, time to get cracking!

[@pedrodaniz9664]

Good old honda engines.... never fail

[@ROBERTBUDA-RBMV]

Hello. How often do you have to replace the piston and rings in this engine? Greetings from Poland.

[@Spoonersoutings]

One reason why I hate 4stroke engines, good job on the rebuild 👍 only smokers for me cheaper and easier to fix

[@mike300406]

you got it I would buy 1 if I was loaded just for an extra bike for some 1 to ride etcetc I would take it out to of course but when I seen all the maintenance even the oil change`s its just as much or more than a 2 stroke which you would think shouldn't be

[@keithsmith4236]

@@mike300406 see I used to think that but all 2t bikes eventually required a complete rebuild due to wear.. mains and big end don't have the benefit of a lovely oil sump to keep em well lubed. I've done too many to count. Next bike is a mont see how I get on with it

[@darrenfowler6990]

Just drowned my 4rt! Did you replace the rod?If so what make and part no and where did you get it from? Thanks.

[@r6eck]

We used Pro X conrod for a CRF250X supplied by Ecosse MX who sell on ebay.Honda don't supply a conrod separately ,its a complete crank from them.If you bend the rod then you will have buckled the piston skirt too.New piston required.All parts used were genuine Honda other than the rod.

[@bobellisp5]

Alex noes his way around these bikes

[@davidswatton74]

good work Alex,

[@canadapainter658]

(I looked it up) it is a low compression bike vs. others and that is why there is no high end speed. It only needs to make you move vs. take off on the slopes...

[@juancarloredondo7751]

hey stive i have honda montesa4rt260 i dont have tank . i want to change the look my plans is card look my problem is i dont have fuel pump of honda montesa and i dont have pgi box what is the similar parts to install for pgi box and fuel pump

[@bikeracr]

how did it hydro lock-blown head gasket or drowned in a puddle,creek ect.?

[@Oldbrokenbones]

Crossing a river, fine at the start but got deep at the other side : (

[@badlarry172]

great film thanks

[@mike300406]

never thought I would ses such a short stroke how does it run some 1 told me its like a vibration

[@Oldbrokenbones]

No it's fine...... smooth with shit loads of torque

[@gscranage4594]

Or a short piston!

[@edrtaylor]

How do you get on with the handlebar tank? Does the siphon work ok?

[@r6eck]

Siphon works fine, im running a 3 litre acerbic tank ,Clark has my "spare" 1 litre tank.

[@Oldbrokenbones]

Like a dream

[@pepetemega9579]

Buen trabajo :)

[@beppeventura4121]

what means Hydro Locked Engine ? thank's

[@jvboy56]

Hydro locked is when a engine has a liquid in the top end which will not compress resulting in the engine not being able to turn over and usually causes damage such as you see here (bent rod) a cracked cylinder ,head or gasket failure can cause this problem as well as the engine sucking in water through if the carb becomes submerged

[@whalesong999]

@@jvboy56 But, how did these get hydro locked? Once had a riding partner in an enduro that sunk his OSSA Plonker in a stream and we had to turn it upside down once on the banks, remove the plug, and turn over and over til it was relieved enough. Was a bugger to restart but he went on to finish w/no rod damage.

[@omdoyot3063]

Buen honda ko uda

[@Despertaferro100]

Nice!

[@dexterthompson1809]

valves sound loose.

[@canadapainter658]

what is the top speed of those bikes?

[@Oldbrokenbones]

On a good day 55mph...

[@canadapainter658]

Steven = it is funny It got so slow top speed as 250cc. A 125cc regular 4Stroke bike can 110km/h top.

[@Oldbrokenbones]

It's down to gearing and the purpose it was built for, I'd like to see anything else ride up a near vertical waterfall..........

[@canadapainter658]

Steven = vertical clime is not bike power it is momentum. Power is there to get momentum.Also I wonder what gearing has to do with it... since a big sprocket in the back can fix torque issue.

[@alanglen5902]

What dreadful music!!!!!!

[@mrpantur7280]

Probs best not to rev a cold engine that's just been rebuilt.

[@Oldbrokenbones]

Yep! we cheated and had it warmed up first : )

[@mrpantur7280]

Steven Clark oh aha ..

[@Oldbrokenbones]

Rod from a CR250! call Micky Oats in Glasgow, tell him you need the same parts for a rebuild, same as the Dundee guy's, he's a fine guy, and will have the parts listed........ 0141 332 7374, we ended up changing the piston too, as there was a little slap we couldn't live with?

[@fulviozilantra643]

Old trial

[@gscranage4594]

From 2004

[@grahamwright8447]

Horrible music , turned off .

[@alanyeo8829]

moved on music sucks

[@Oldbrokenbones]

turn the volume down .................. youtube changed it....... not my selection