Inlet rubber3bn/3et
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Slightly of topic but the same part of the engine, is the gasket on the inlet a rubber one? There’s a rubber one on mine and it has an air leak, I remember on my other engine it was the cereal box type @ricky0115 It should be a paper type, quite common for these to let air in here when botched. 
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@ricky0115 It should be a paper type, quite common for these to let air in here when botched. 
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@calum god damn, the bike should run without the choke when I get that replaced then. Fingers crossed! Cheers @ricky0115 Use Athena, or OEM gaskets only. You can get some paper gasket adhesive to just ensure it's properly sealed. It's what I've used on my engines. 
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@ricky0115 Use Athena, or OEM gaskets only. You can get some paper gasket adhesive to just ensure it's properly sealed. It's what I've used on my engines. 
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Just received set for the 89 bike, ordered via ebay, £20 something, used before on the 88, athena the way to go 
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@ricky0115 For gaskets and obtaining authentic genuine athena gaskets. Choose none other than PJME. But personal preference. I use eBay for almost everything else. 
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@ricky0115 For gaskets and obtaining authentic genuine athena gaskets. Choose none other than PJME. But personal preference. I use eBay for almost everything else. 
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@ricky0115 https://www.pjme.co.uk/acatalog/Yamaha_DT125R_Tools___Workshop_Equipment_.html Loctite Adhesive Spray. Bought that like 5 years ago and still use it today. People will no doubt say it's unnecessary. All I can say is I've only built engines with it and never had any problems. But I'll admit it's potentially over cautious. 
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@ricky0115 https://www.pjme.co.uk/acatalog/Yamaha_DT125R_Tools___Workshop_Equipment_.html Loctite Adhesive Spray. Bought that like 5 years ago and still use it today. People will no doubt say it's unnecessary. All I can say is I've only built engines with it and never had any problems. But I'll admit it's potentially over cautious. 
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@calum it was made for a reason why not use it! Especially on that annoying gasket on top of the carb @ricky0115 don’t use rtv silicone it ends up in your reed cage 


